Unification of Czech terminology in Special:Listgrants

Unification of Czech terminology in Special:Listgrants

The title of Special:Listgrants was "Svolení" in Czech
and the name of the special page was "Seznam grantů".
None of this has the exact meaning as the original title/name.
The Czech word "Grant" (another form of "grantů")
usualy means a financial gift from somebody limited by its purpose.

The Czech word "Svolení" has similar meaning as "agreement" in English.

"Skupina oprávnění" can be translated as "Group of permissions".

I've changed related pages in translatewiki.net to update
the description, displayed title and the title of the first
column in table which is generated by this special page.

It has been suggested by Dvorapa at my talk page in cswiki, see
https://cs.wikipedia.org/?oldid=13980091#Granty.3F_Svolen.C3.AD.3F
(in Czech).

Change-Id: Ic3148fc689de32bcba6344ad1f98491c5f540973