- Remove the default Qt dragMargin: when the right pane was
hidden/collapsed in the interface, accidentally clicking on this
invisible 10 pixel-wide zone to the right edge of the window
would interfere with any button under it, e.g. the button to
expand the pane
- Fix expand pane button failing to bring back pane (due to dragMargin)
and turning the chat page header invisible
- Disable swiping to exit panes, interferes with buttons and tiles