Update locale/lt_LT.ts
Better keyboard support in Dictionaries tab:

1. Pressing Down Arrow allows to jump from the Quick Filter to the dictionaries list.
2. Navigating through dictionary list via keyboard (Up/Down) results in dictionary details
   to be shown on the right. Previously, only mouse clicks updated the dictionary info.
Merge pull request #153 from embar-/patch-1

Update locale/lt_LT.ts
Updated a year to 2013.
Year-related translation updates by Daniele Di Pisa.