rangecheck: rewrite of the 40y range check

* remove the bad notice in GUI
* set default interval to "2"
* prevent all frames of being updated at once
* refresh one unit after the other
* use textures insted of spellnames
* change interval settings to dropdown
* remove no longer required locales

env/locales_ruRU.lua

@@ -26,13 +26,6 @@ pfUI_locale["ruRU"]["itemtypes"] = {
   ["INVTYPE_PROJECTILE"] = "Боеприпасы",
 }
 
-pfUI_locale["ruRU"]["rangecheck"] = {
-  ["PALADIN"] = "Свет небес",
-  ["PRIEST"] = "Быстрое исцеление",
-  ["DRUID"] = "Целительное прикосновение",
-  ["SHAMAN"] = "Волна исцеления",
-}
-
 pfUI_locale["ruRU"]["hunterpaging"] = {
   ["MELEE"] = "Подрезать крылья",
   ["RANGED"] = "Чародейский выстрел",