Backported r10792 and r10793 from trunk (#12310).
Merged r10810 from trunk (#12359).
Merged r10790 from trunk (#12294).
Merged r10801 from trunk (#12349).
Issue "Update" link broken focus (#12356).
Patch by Alexander Oryol.
Merged r10813 from trunk (#12375)
svn propset svn:eol-style native to fixtures.
Merged r10812 from trunk (#12375)
fix receiving mail subject broken which does not begin with encoding name.
Merged r10811 from trunk (#12375)
add test of receiving mail subject begins with encoding name.
replace non ASCII characters to hexadecimals at unit mail handler test
svn propset svn:eol-style native to fixtures (#12375)
