Rtl direction breaks filenames formatting in the sidebar

Issue was described in the mailing list https://groups.google.com/forum/?fromgroups#!topic/light-table-discussion/zp3i7jKTI2Y

Screenshots from here:
https://dl.dropboxusercontent.com/u/561580/share/lighttable%20open%20file%201.png
https://dl.dropboxusercontent.com/u/561580/share/lighttable%20open%20file%202.png


Direction css property should not be used for styling purposes, and it seems that its removal doesn't break anything.