Correctly report portrait and landscape mode

Listen for primary-monitor configure changes rather than grabbing the orientation right away. Also make sure we don't show the wrong orientation on native landscape displays

Closes: #265 (closed), #326 (closed)

added 6 commits

• 81a41296...1a90c5f8 - 2 commits from branch Librem5:master
• da956959 - shell: Attach to primary monitors configured signal
• b1dc5d03 - rotateinfo: Mark orientations as translatable
• 4ce7b731 - rotateinfo: Take display geometry into account
• a9825bd1 - shell: Undo rotation on startup

Compare with previous version

enabled an automatic merge when the pipeline for a9825bd1 succeeds

merged