AutoNum: a lot of changes

Schemas now get saved with a UUID and do not have to be looked up according to the form. They can be renamed and it gets reflected in existing elements. The GUI for
editing them is now much easier, e.g. forms can be reshuffled. A formula can be applied. Many options now also for conductors and sheets.

misc/qet-mcp/qet_mcp.py

@@ -1444,9 +1444,17 @@ OPS = {
     "add_autonum":      ("addAutoNum",          [("kind", "str"), ("name", "str"),
                                                  ("parts", "list")]),
     "remove_autonum":   ("removeAutoNum",       [("kind", "str"), ("name", "str")]),
+    "rename_autonum":   ("renameAutoNum",       [("kind", "str"), ("name", "str"),
+                                                 ("new_name", "str")]),
     "use_conductor_autonum": ("useConductorAutoNum", [("folio", "folio"), ("name", "str")]),
     "use_element_autonum": ("useElementAutoNum", [("name", "str")]),
     "number_element":   ("numberElement",       [("folio", "folio"), ("element", "elmt")]),
+    "renumber_element_autonum": ("renumberElementAutoNum", [("name", "str")]),
+    "free_element_numbers": ("freeElementNumbers", [("folio", "folio"), ("element", "elmt")]),
+    "assign_element_number": ("assignElementNumber", [("folio", "folio"), ("element", "elmt"),
+                                                      ("number", "num")]),
+    "assign_element_autonum": ("assignElementAutoNum", [("name", "str"), ("folio", "folio"),
+                                                        ("element", "elmt"), ("overwrite", "bool")]),
     # The text fields drawn on a symbol. Indexed within the element's own
     # list, which follows its definition and shifts on delete (and undo of a
     # delete puts the field back at the end).
@@ -1959,7 +1967,7 @@ def _build_script(operations: list, output: str) -> str:
             raise ValueError(f"operation {i}: unknown folio property "
                              f"{op.get('property')!r}; expected one of "
                              f"{', '.join(FOLIO_PROPERTIES)}")
-        if name in ("add_autonum", "remove_autonum") and op.get("kind") not in AUTONUM_KINDS:
+        if name in ("add_autonum", "remove_autonum", "rename_autonum") and op.get("kind") not in AUTONUM_KINDS:
             raise ValueError(f"operation {i}: unknown kind {op.get('kind')!r}; "
                              f"expected one of {', '.join(AUTONUM_KINDS)}")
         if name == "search_and_replace":
@@ -4500,6 +4508,18 @@ TOOLS = [
                         "use_conductor_autonum then makes new conductors on a folio "
                         "take their number from it, so define and select it BEFORE the "
                         "add_conductor ops it should number. For elements, "
+                        "renumber_element_autonum numbers an element context's elements again "
+                        "(an element with a frozen label keeps its label, and nobody else gets it); "
+                        "free_element_numbers lists the numbers an element of an element context may "
+                        "be given by hand, assign_element_number gives it one of them "
+                        "(it keeps following the context, its counter moves past the number); "
+                        "assign_element_autonum makes one element follow a named element context "
+                        "(refused when it holds a formula, frozen label or follows "
+                        "another one, unless overwrite is true); "
+                        "rename_autonum renames a context of any kind, what follows it (elements, or "
+                        "the folios of a conductor or folio context) keeps following it; "
+                        "remove_autonum refuses a context which elements (element kind) or "
+                        "folios (conductor and folio kinds) still follow. "
                         "use_element_autonum selects the context and number_element applies "
                         "it to one element AFTER it is placed (add_element does not number "
                         "what it places); slaves and reports are refused, since they take "

misc/qet-mcp/test_qet_mcp.py

@@ -441,6 +441,7 @@ class EditValidation(unittest.TestCase):
             "sort_terminal_strip": [{"op": "sort_terminal_strip", "strip": 0}],
             "add_autonum": [{"op": "add_autonum", "kind": "conductor", "name": "W", "parts": ["string:W"]}],
             "remove_autonum": [{"op": "remove_autonum", "kind": "conductor", "name": "W"}],
+            "rename_autonum": [{"op": "rename_autonum", "kind": "element", "name": "EL", "new_name": "EL2"}],
             "use_conductor_autonum": [f, {"op": "use_conductor_autonum", "folio": "$f", "name": "W"}],
             "use_element_autonum": [{"op": "use_element_autonum", "name": "EL"}],
             "insert_folio": [{"op": "insert_folio", "id": "i", "position": 0}],
@@ -458,6 +459,12 @@ class EditValidation(unittest.TestCase):
             "duplicate_elements": el + [{"op": "duplicate_elements", "id": "d", "folio": "$f",
                                          "elements": ["$e"], "to_folio": "$f", "x": 50, "y": 50}],
             "number_element": el + [{"op": "number_element", "folio": "$f", "element": "$e"}],
+            "renumber_element_autonum": [{"op": "renumber_element_autonum", "name": "EL"}],
+            "free_element_numbers": el + [{"op": "free_element_numbers", "folio": "$f", "element": "$e"}],
+            "assign_element_number": el + [{"op": "assign_element_number", "folio": "$f",
+                                            "element": "$e", "number": 3}],
+            "assign_element_autonum": el + [{"op": "assign_element_autonum", "name": "EL", "folio": "$f",
+                                             "element": "$e", "overwrite": False}],
             "add_table": [f, {"op": "add_table", "id": "t", "folio": "$f", "kind": "nomenclature",
                               "name": "BOM", "query": "SELECT label FROM element_nomenclature_view"}],
             "set_table_position": [f, {"op": "add_table", "id": "t", "folio": "$f", "kind": "nomenclature",