Karma coverage error presentation improvement
(cherry picked from commit e90817f)
show Karma server console if Karma server fails at startup and coverage required
(cherry picked from commit 931e0d0)
WEB-8939 Karma: make Run with Coverage more user-friendly
(cherry picked from commit 2476f5e)
show 'Coverage Configuration Error' tab always if coverage is badly configured
(cherry picked from commit 30860fe)
Revert versions: update since/until build for plugins (WEB-9021)
WEB-7672 What about Dart documentation?
(cherry picked from commit 9dc22a2)

CR-WS-68
show warning message in scroll pane
(cherry picked from commit 39760e5)
http://crucible.labs.intellij.net/cru/CR-WS-72
Dart: fixed a url for std libs
(cherry picked from commit f331156)