Profiles system stability improvements and fixes, qt5 works.

Now everything that uses Profiles from cache will also use it's
mutex to lock access. This brings more stability improvements :).
Also fixed profile update in database.

Qt5 interface is now translated (kinda).

urtrator.go

@@ -14,6 +14,7 @@ import (
     "github.com/pztrn/urtrator/common"
     "github.com/pztrn/urtrator/context"
     "github.com/pztrn/urtrator/ui/gtk2"
+    //"github.com/pztrn/urtrator/ui/qt5"
 
     // stdlib
     "fmt"