The check is `type == info` && `desc == null`

IDEA-206482 handle errors from plugins as PluginException as it is not platform issues, disable support for data class for bean extension to be able to easily detect not appropriate constructor

IDEA-206474 instead of language IllegalStateException exception, handle it explicitly and report incorrect element data

efficient loadScheme - preload byte array instead of using input stream because caller can use more efficient way to load file content

For VFS better to use `contentsToByteArray` and for NIO better to use `Files.readAllBytes`.
For ICS input is used as before.

StoreAwareProjectManager - on unblock execute reload using alarm, to make sure that save will be not surprised by invokeLater

f162c881 follow-up

IDEA-206423

b07ed93d follow-up

ProgressManager.checkCanceled, when a progress is started under a canceled indicator wrapper with its base indicator not canceled

Add model provider interface. It will allow a plugin to decide on-the-fly, what models to collect inside Gradle runtime.

make VirtualFile id always positive and fast, not depending on validity (for speeding up everything after JRE-1124)