IDEA-114955 Add support for filtering by regular expressions in Subversion repository view
IDEA-114955 Cosmetic code style changes
IDEA-114955 Display an error message when invalid regex is entered
IDEA-114955 Show red background in the search box if it doesn't match any commits or if regex is invalid
IDEA-114955 Use existing helper method to get the default background color instead of storing it in a field.
External system: debug info added for orphan modules processing
getter for provider
fix directory search
Merge branch 'svn-history-regex-filter' of https://github.com/pkrcah/intellij-community

Pull request https://github.com/JetBrains/intellij-community/pull/109
Merge remote-tracking branch 'origin/master'