Merge pull request #4115 from OpenShot/app-launch2

Overhaul app launching, unit tests

Author: ferdnyc

.github/workflows/ci.yml

@@ -32,4 +32,4 @@ jobs:
       run: python3 freeze.py build
 
     - name: Test
-      run: xvfb-run --auto-servernum --server-num=1 --server-args "-screen 0 1920x1080x24" python3 ./src/tests/query_tests.py
+      run: python3 ./src/tests/query_tests.py -platform minimal