IDEA-75181

Anton Tarasov

for "'StringBuilder' can be replaced with 'String'" inspection

This is needed to get rid of dependency from UrlClassLoader to FileUtil (IDEA-206894).

platform: refactor FileUtil.toCanonicalPath to extract part which handles symlinks to a separate interface

This is needed move the other part to util.rt module and use it from UrlClassLoader to get rid of dependency on util module (IDEA-206894).

platform: rewrite code in UrlClassLoader-related classes to get rid of dependencies on classes from util module

This is needed to extract UrlClassLoader to a separate module (IDEA-206894).

This is needed to extract UrlClassLoader to a separate module (IDEA-206894).

cleanup: inline RichPlatformPlugin.xml and RichPlatformActions.xml into JavaIdePlugin.xml and JavaActions.xml

These component configuration files were used for Flex IDE, but this isn't actual anymore. By removing them we simplify configuration files and make it easier to extract Java support to a separate plugin (IDEA-195719).

* fix the problem: when we modify files a.e. during silent unshelve (in active list by the time of modifications)
 conflict tracker schedules a separated invokeAfterUpdate task that can't be canceled.
 The active changelist can be changed after 'files check' scheduling but before CLM.update. So by the time of checking
 changelist (after update) new conflicts occur;

* add annotations;
* cleanup:

* during CLM freezing process everything was OK even for nullable target changelist; but during conflict resolving freezing process was interrupted and
some changes may have been applied to active list;