update subversive Icons to fit also dark themes (bug 473419)
https://bugs.eclipse.org/bugs/show_bug.cgi?id=473419

git-svn-id: https://dev.eclipse.org/svnroot/technology/org.eclipse.subversive/trunk@21598 ee007c2a-0a25-0410-9ab9-bf268980928c
19 files changed