This includes the auto-hide of each panel as well as the shown/hidden status
of each of the displays. Now that it's consistent, it makes it so much more useful.
This is an experimental idea. We can add to a myPanel a list of widgets to show/hide
if the user wants to, via the context menu. This can be very useful for a user who
wants to disable auto-hide for the bottom panel but remove the theme selector which
can be useless to have open permanently.
This is the first step in fixing #234. Would need the auto-hide and the displays
configurations to be saved in settings though before it can become usable.
Color scheme was inverted if foreground was transparent, bug and fix provided
by @tildagail [1] and the text on the left side panel was ignoring text color
settings, making it unreadable in dark themes, as reported by @worstje in #527
[1] https://github.com/olivierkes/manuskript/issues/527#issuecomment-469578130
If you right click once on the fullscreen panel and the context menu pop up
then you right click again somewhere else on the panel *while the previous
context menu is still visible* then it will cause a crash with :
"Windows fatal exception: access violation"
It seems to be caused by a crash in the QT event loop, trying to delete the
existing QMenu within an event handler.
The lambda function will keep a reference to the scrollbar python object preventing it
from getting destroyed when the QScrollbar is destroyed. This causes the underlying
QT widget to be freed while the python object still exists, therefore the timer itself
doesn't get stopped/cleaned, so the timer will get called and cause a crash with :
"RuntimeError: Wrapped C/C++ object of type myScrollbar has been deleted"
To reproduce, press F11 repeatedly while scrolling.
