Grepview: Colorize the correct label on error

Also use KColorScheme in order to not hardcode any colors
SVN_SILENT made messages (.desktop file)
Patch for bug 328307

No horizontal scrolling possible in grepview

Fixes the issue with horizontal scrolling described in the bug report.
Also fixes a known issue with text width calculation which becomes very obvious with horizontal scrolling.

REVIEW: 115342
BUG: 328307
SVN_SILENT made messages (.desktop file)
Merge remote-tracking branch 'origin/1.6'
GCC: Turn off -Wmissing-field-initializers
Fix crash issue when DuChain was unlocked to early.

This follows through a846cb4bb7ea774ecff9cb9ca5bffed132d1b180