Fix clear_search_hostory in Greek Language

The translated string was missing the word "search" in Greek
Merge pull request #448 from pavlospt/master

Fix clear_search_hostory in Greek Language
Translation to Norwegian (Bokmål)
Merge pull request #450 from francisrath/patch-1

Translation to Norwegian (Bokmål)
Update Russian translation
Merge pull request #451 from lacrosse/update-russian-translation

Update Russian translation
Fix a translation
Merge pull request #460 from lacrosse/update-russian-translation

Minor fix for Russian translation