en to bg translation catalogue (4 entries)

[ctx: name of the change]
en: Insert
bg: Вмъкване

[ctx: name of the change]
en: Remove
bg: Премахване

[ctx: name of the change]
en: Replace
bg: Замяна

[ctx: name of the change]
en: Swap Ranges
bg: Обръщане на обхватите
