Fix duplicate urls in library definition after library update. For repository libraries also invalid urls are removed on synchronization (affects IDEA-173130)

on IDEA-CR-21289

UISettings now uses smart base state class — "modification tracker and default values".

```
var activeRightEditorOnClose by storedProperty(false)
```

So, default value will be `false`. When user sets it to `false` (because you set it programmatically after start to `true`), nothing is saved. And on next start you again set it to `true`.

[parameter hints] ParameterHintsPass generified and extracted in order to use it manually on specified PsiElements

sizeof(start marker) = 48 instead of 56 bytes
sizeof(done marker) = 32 instead of 40 bytes

on IDEA-CR-21289

Gradle java-library plugin support fix, use compileOnly configuration for the provided dependencies check because since version 3.4 compileOnly no longer extends compile (IDEA-173028)

IDEA-170170 Kotlin compiler cannot find its libraries after the Idea application directory is changed

Fix EDU-959 Stepic icon is missing in newly created project: there is no need to wait for project initialization to add stepic widget