Fix critical rendering bug. Please backport.

Cherry-pick from trunk@33246. From jbrefort

git-svn-id: svn+ssh://svn.abisource.com/svnroot/abiword/branches/ABI-3-0-0-STABLE@33269 bcba8976-2d24-0410-9c9c-aab3bd5fdfd6
Fixed color chooser signal name. Please backport.

Cherry-pick from trunk@33266. From jbrefort

git-svn-id: svn+ssh://svn.abisource.com/svnroot/abiword/branches/ABI-3-0-0-STABLE@33270 bcba8976-2d24-0410-9c9c-aab3bd5fdfd6
Spanish L10n from fserrador

Cherry-pick from trunk@33256. From cjl

git-svn-id: svn+ssh://svn.abisource.com/svnroot/abiword/branches/ABI-3-0-0-STABLE@33271 bcba8976-2d24-0410-9c9c-aab3bd5fdfd6
Breton (br-FR) L10n from DenisArnaud

Cherry-pick from trunk@33260. From cjl

git-svn-id: svn+ssh://svn.abisource.com/svnroot/abiword/branches/ABI-3-0-0-STABLE@33272 bcba8976-2d24-0410-9c9c-aab3bd5fdfd6
Fix r33266 to work with Gtk3 AND Gtk2. Backport.

Cherry-pick from trunk@33273.

git-svn-id: svn+ssh://svn.abisource.com/svnroot/abiword/branches/ABI-3-0-0-STABLE@33274 bcba8976-2d24-0410-9c9c-aab3bd5fdfd6