Add natural sort of entry list

Introduce a third unsorted status that shows entries in the order they occur in the KDBX file.

* Add keyboard shortcut Ctrl+Alt+Up/Down to move entries up and down in sort order
* Add entry context menu icons to achieve movement up/down
* Only show menu icons when in natural sort order
* Add Material Design icons for moving up/down

* Add feature to track non-data changes and force a save on exit to ensure they are not lost when locking a database. This allows users to make entry movements and group expand/collapse operations and not lose that state.

Remove saveas

tests/TestEntry.h

@@ -38,6 +38,7 @@ private slots:
     void testResolveNonIdPlaceholdersToUuid();
     void testResolveClonedEntry();
     void testIsRecycled();
+    void testMove();
 };
 
 #endif // KEEPASSX_TESTENTRY_H