SVN_SILENT made messages (.desktop file)
Workaround a crash on Mac OS X after finishing code review.

On OS X, kdevelop would crash after clicking on the "Finish Review"
button, at least when the path review tool was started through a
project's git->differences. This crash occurred with the current
stable release (kdevplatform 1.6.0) through the 4.7ß up to and
including kdevplatform git/kde4-legacy.

REVIEW: 120081
BUG: 338829
Use match accuracy when asking for mime type.

Ask KMimeType about match accuracy and if it's very low don't
register languages for that mime type.

Otherwise we can accidently register e.g. *.txt files as supported by
c++ language support plugin.

REVIEW: 120085