Improve Auto-Type Select Dialog

Significant improvements to the Auto-Type select dialog. Reduce stale and unnecessary code paths.

* Close select dialog when databases are locked.
* Close open modal dialogs prior to showing the Auto-Type select dialog to prevent interference.
* Never perform Auto-Type on the KeePassXC window.
* Only filter match list based on Group, Title, and Username column data (ie, ignore sequence column)
* Always show the sequence column (revert feature)
* Show selection dialog if there are no matches to allow for a database search

* Close #3630 - Allow typing {USERNAME} and {PASSWORD} from selection dialog (right-click menu).
* Close #429 - Ability to search open databases for an entry from the Auto-Type selection dialog.
* Fix #5361 - Default size of selection dialog doesn't cut off matches

src/gui/MainWindow.h

@@ -60,6 +60,11 @@ public:
         PasswordGeneratorScreen = 3
     };
 
+signals:
+    void databaseUnlocked(DatabaseWidget* dbWidget);
+    void databaseLocked(DatabaseWidget* dbWidget);
+    void activeDatabaseChanged(DatabaseWidget* dbWidget);
+
 public slots:
     void openDatabase(const QString& filePath, const QString& password = {}, const QString& keyfile = {});
     void appExit();
@@ -136,8 +141,6 @@ private slots:
     void obtainContextFocusLock();
     void releaseContextFocusLock();
     void agentEnabled(bool enabled);
-
-private slots:
     void updateTrayIcon();
 
 private: