Intuitive Menu Navigation for Mobile (Add "Back" Button) + Buildozer portability

[bwrightkc]

On the mobile/Kivy UI, opening a menu, then opening a submenu, then tapping the menu button again would stack a second menu panel side-by-side with the first instead of replacing it.

The fix: only one navigational panel (main menu, a submenu, the game picker, help, or about) is ever shown at a time. Opening a new one now automatically closes whatever panel was already open, so navigation always feels like moving to a new screen rather than piling windows up. Confirmation dialogs/notes are unaffected and still will appear next to the menu.

Adds feature requested in #551

Also added a "< Back" entry at the top of every submenu, so you can jump straight back to the main menu without needing to close the submenu and tap the hamburger icon again.

Separately, fixed two small portability bugs in the buildozer/ build scripts that broke Android builds on macOS. Mainly sed -i doesn't function quite the same on macOS.

Requesting people to test this prior to potential merge.

[bwrightkc]

[joeraz]

A good start, but there are a couple bugs I found:

• There is no back button on the Games menu.
• Clicking the Statistics menu causes a crash. The stack trace is as follows:

 Traceback (most recent call last):
   File "\PySolFC\pysol.py", line 41, in <module>
     sys.exit(main(sys.argv))
              ~~~~^^^^^^^^^^
   File "\PySolFC\pysollib\main.py", line 462, in main
     LApp(args).run()
     ~~~~~~~~~~~~~~^^
   File "\Python313\Lib\site-packages\kivy\app.py", line 956, in run
     runTouchApp()
     ~~~~~~~~~~~^^
   File "\Python313\Lib\site-packages\kivy\base.py", line 574, in runTouchApp
     EventLoop.mainloop()
     ~~~~~~~~~~~~~~~~~~^^
   File "\Python313\Lib\site-packages\kivy\base.py", line 339, in mainloop
     self.idle()
     ~~~~~~~~~^^
   File "\Python313\Lib\site-packages\kivy\base.py", line 379, in idle
     Clock.tick()
     ~~~~~~~~~~^^
   File "\Python313\Lib\site-packages\kivy\clock.py", line 733, in tick
     self.post_idle(ts, self.idle())
     ~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^
   File "\Python313\Lib\site-packages\kivy\clock.py", line 776, in post_idle
     self._process_events()
     ~~~~~~~~~~~~~~~~~~~~^^
   File "kivy\\_clock.pyx", line 620, in kivy._clock.CyClockBase._process_events
   File "kivy\\_clock.pyx", line 653, in kivy._clock.CyClockBase._process_events
   File "kivy\\_clock.pyx", line 649, in kivy._clock.CyClockBase._process_events
   File "kivy\\_clock.pyx", line 218, in kivy._clock.ClockEvent.tick
   File "\PySolFC\pysollib\kivy\LApp.py", line 1124, in commandCB
     self.command()
     ~~~~~~~~~~~~^^
   File "\PySolFC\pysollib\kivy\menubar.py", line 88, in auto_close_command
     command()
     ~~~~~~~^^
   File "\PySolFC\pysollib\kivy\menubar.py", line 1973, in mGameMenuDialog
     GameMenuDialog(self, self.top, title=_("Statistics"), app=self.app)
     ~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   File "\PySolFC\pysollib\kivy\menubar.py", line 453, in __init__
     super().__init__(
     ~~~~~~~~~~~~~~~~^
         menubar, parent, title, app, **kw)
         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   File "\PySolFC\pysollib\kivy\menubar.py", line 234, in __init__
     self.buildTree(tv, None)
     ~~~~~~~~~~~~~~^^^^^^^^^^
   File "\PySolFC\pysollib\kivy\menubar.py", line 464, in buildTree
     self.addBackNode(tv)
     ~~~~~~~~~~~~~~~~^^^^
   File "\PySolFC\pysollib\kivy\menubar.py", line 146, in addBackNode
     command=self.make_command(self.menubar.mMainMenuDialog)))
             ~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 TypeError: GameMenuDialog.make_command() missing 1 required positional argument: 'command'

[bwrightkc]

A good start, but there are a couple bugs I found:

* Clicking the Statistics menu causes a crash.  The stack trace is as follows:

 TypeError: GameMenuDialog.make_command() missing 1 required positional argument: 'command'

Agh! I didn't see make_command() defined differently down there. I'll fix that.

Also adding back button to games menu, and going to make it a translatable string as well.

[joeraz]

Seems to be working good now. Are you still making tweaks, or am I good to merge?

[bwrightkc]

Good to merge

[joeraz]

Perfect, thanks!