Improve multiple clicks message selection

- Triple click selects the message body without date or name
- Quadruple click (yes) selects the entire message with name and date
- Quadruple click on the name label does the same

TODO.md

@@ -26,7 +26,6 @@
   - Message position after daybreak delegate  (fixed by commit 57b1313 ?)
   - [hr not working](https://bugreports.qt.io/browse/QTBUG-74342)
   - Terrible performance using `QT_QPA_PLATFORM=wayland-egl`, must use `xcb`
-  - Verify big avatars aren't downloaded uselessly
 
 - UI
   - Set an explicit placeholder text color for text field/area
@@ -37,7 +36,6 @@
 
   - Message selection
     - Copy to X11 selection
-    - Images don't load correctly in TextEdit
 
   - Just use Shortcut onHeld instead of analyzing the current velocity
     in `smartVerticalFlick()`