VcsRootDetector and RootErrorsFinder tests updated

*MockAbstractVcs used instead of GitVcs;
*MockVcs and MockVcsChecker registered with ProjectLevelVcsManager;
*.git and Git words  replaced by mock and .mock
IDEA-114461 Structure tool window: Jump to Source (F4) does not move focus to Editor
cleanup
don't log Connection reset by peer
EA-51325 - assert: MavenIndices.createNewDir
EA-51425 - ISE: MavenUtil.resolveSuperPomFile
add assertion.
IDEA-116197 (filter improvements)
'Download library' refactored a little
overrides
IDEA-100279 copyright plugin
IDEA-100279 xml editor location dialog
IDEA-100279 git init
overrides, cleanup
fix warning "mac file equals"
IDEA-100279 ChooseComponentsToExportDialog
IDEA-115787 Better resolvement for JSF page URLs
continue "ability to return list of URLs"  IDEA-115787
do not suppress file-level inspections
IDEA-75717 ("Referenced checked for null not used inside if" false positive)
reliably check if a task for debugger manager thread was interrupted