platform: catch exceptions in startup thread
platform: unified check for headless environment
platform: log exceptions once
platform: unified handling of startup errors
platform: system L&F in startup dialogs
platform: direct dependencies instead of service polling; tests moved
platform: ancient Swing property dropped
platform: common startup code extracted
ignore schedule in tests
IndexTest -> community
test for stub-ast mismatch
Merge remote-tracking branch 'origin/master'