Added more translatable strings in code. Updated template tools.pot.

also improved Russian localization.

akien-mga Note that to avoid such hard to fix conflicts for a future PR, I'd advise you to do first a commit to change the source code, and only then make a second commit to regenerate the .pot file and update all .po files (using make all).

I do not understand how to update .pot and all .po files. Sorry.