flip footer of modal dialog  
flip footer of modal dialog  

there was faulty flip in footer of modal dialog.
it does not work correctly with pull-right or pull-left.
bahtiyara/bootstrap-rtl,hoangkien/bootstrap-rtl,hoangkien/bootstrap-rtl,bright/bootstrap-rtl,slang-group/bootstrap-rtl,voltan/bootstrap-rtl,ImanMh/bootstrap-rtl,MenZil/bootstrap-rtl,sharawy/bootstrap-rtl,prium/bootstrap-rtl,slang-group/bootstrap-rtl