fix(access): ported pop-up dialogs to flex layout
Currently based on #2100 and shall be rebased once that PR is merged.
The color screen ACCESS menus are much better! And I am no longer getting any telemetry dropouts on my X12S ISRM or X9D+2019.
I noticed the Page Up/Down buttons don't work on the model setup screen when the cursor is on Model name. If I scroll to any other element, it works fine. Doesn't happen in the nightly.

And unless this is outside of the work you did with fixing up the dialog windows, there should be a receiver number/model ID field for ACCESS too 😬https://github.com/EdgeTX/edgetx/issues/2146
@rburrow87 Page Up/Down should work again now, and receiver ID has been added.
Looks good to me! 😀
@rburrow87 no more telemetry drops?
Nope! 30+ minutes and had no telemetry drops using this PR.
If that does something for 868 915 mhz menu i would try a build