[Improvement Proposal] listing of keyboard layouts in anaconda

[Sundeep Anand]

Hi,

Please refer: https://bugzilla.redhat.com/show_bug.cgi?id=1158370 (list major common
keyboard layouts first)

An attempt could be made to determine major keyboard layouts from langtable[1] and place
them up in the order[2]. 
Which may help users find them with a lesser scroll.

thoughts?

thanks,
sundeep

[1] https://github.com/mike-fabian/langtable/pull/11
[2] https://github.com/rhinstaller/anaconda/pull/2788