Czech: fixed translation, added new strings

patch #2 - fixed typos
patch #3 - some fixes and translated unintentionally untranslated
  strings

Change-Id: I288bf43a027286c4c08f2a7761fc2bc19b77f04c
Merge "Czech: fixed translation, added new strings" into cm-10.1
Merge remote-tracking branch 'upstream/cm-10.1' into cm-10.1