Add options to leave junctions and contact blocks out of the parts list (#1178)

Since #849 the parts list has a row for every contact block (slave) and
terminal-type element. Users who draw the dots and bends where wires
branch as terminal-type symbols (114_connections) get one empty row per
junction: 109 of 151 rows on one reported cabinet.

Two options, both off by default so existing exports are unchanged:
- leave out the contact blocks: --no-slaves, "no_slaves" in qet_export,
  or uncheck the new "Contacts esclaves" element type in the dialog;
- leave out the junctions: terminal-type elements with no label,
  designation, manufacturer or manufacturer reference. --no-junctions,
  "no_junctions", or "Laisser de côté les jonctions" in the dialog.
  A terminal block with a label or a part number stays.

The element type filter had no box for slaves, so every query it built
left them out: the export dialog never listed contact blocks, although
the command line has since #849. The dialog now checks the new box by
default and gives the same rows as --export-bom. The box is unchecked by
default elsewhere, so nomenclature tables keep their rows.

docs/smart-device-bom.md still said slaves and terminals were excluded;
corrected.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

sources/dataBase/ui/elementquerywidget.h

@@ -45,6 +45,8 @@ class ElementQueryWidget : public QWidget
 		QString queryStr() const;
 		void setGroupBy(QString text, bool set = true);
 		void setCount(QString text, bool set = true);
+		void setSlavesIncluded(bool included);
+		void setExtraFilter(const QString &text, bool set = true);
 
 		static QString modelIdentifier() {return "nomenclature";}
 
@@ -67,6 +69,7 @@ class ElementQueryWidget : public QWidget
 		void on_m_choosen_list_itemDoubleClicked(QListWidgetItem *item);
 
 		void updateQueryLine();
+		void updateAllCheckState();
 		QStringList selectedKeys() const;
 		void setUpItems();
 		QPair<int, QString> FilterFor(const QString &key) const;
@@ -82,7 +85,8 @@ class ElementQueryWidget : public QWidget
 		QList <QListWidgetItem *> m_items_list;
 		QString m_custom_query,
 				m_group_by,
-				m_count;
+				m_count,
+				m_extra_filter;
 		QHash <QString, QPair<int, QString>> m_filter;
 };