MPS-18756 The text "Early Access Program" appears on the background of the MacOS installer
Merge branch '3.0/mikev/test' into MPS3.0
Use PluginContributor's in ApplicationPluginManager and ProjectPluginManager
remove BaseApplicationPluginManager
simplified PluginUtil
incremental ProjectPluginManager (1)
incremental ProjectPluginManager (2)
minor changes
incremental ProjectPluginManager (3)
recreate tabs inside read action
extract BasePluginManager
use BasePluginManager in ApplicationPluginManager
move all contributors logic into PluginReloader
minor changes
support incremental plugins reloader in classes handler
incremental plugin reload (not working)
provide PluginInitializer via plugins xml
remove unnecessary StandalonePluginDescriptors
fix duplicated groups after plugins reload
fix exception on mps exit