Commit Dialog:

- Commit messages must not be empty
- Double-clicking a file invokes diff
FileAction Dialog:
- Optional checkbox

MainWindow:
- Added Rename/Undo/About Actions
- Added Renamed/Missing file states
- Added tooltips to status column
- Support for running fossil in detached mode (to prevent killing fossil due to timeout on diff sessions)


FossilOrigin-Name: ea42e7cd8b7041d82e35720b14e30437b6db6e0d

CommitDialog.ui

@@ -44,7 +44,7 @@
        <bool>true</bool>
       </property>
       <property name="selectionMode">
-       <enum>QAbstractItemView::NoSelection</enum>
+       <enum>QAbstractItemView::SingleSelection</enum>
       </property>
       <property name="selectionBehavior">
        <enum>QAbstractItemView::SelectRows</enum>