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

src/core/Entry.cpp

@@ -1066,6 +1066,20 @@ QString Entry::referenceFieldValue(EntryReferenceType referenceType) const
     return QString();
 }
 
+void Entry::moveUp()
+{
+    if (m_group) {
+        m_group->moveEntryUp(this);
+    }
+}
+
+void Entry::moveDown()
+{
+    if (m_group) {
+        m_group->moveEntryDown(this);
+    }
+}
+
 Group* Entry::group()
 {
     return m_group;