Bulgarian translation updated by Ivan Cenov (#10154)
Fixes assertion.
Better handling of issue update conflicts (#8691).
Revision graph code cleanup.
replace tabs to spaces at public/help/wiki_syntax_detailed.html
Removed useless code.
Backported r8686 from trunk (#10013).
Merged r8568 from trunk (#9937).
Merged r8231, r8235, r8236, 8237 from trunk (#9795).
Merged r8258 from trunk (#9793).