Setted bigger heigh and width of the login window 

Setted bigger heigh and width of the login window  so scrallbars 
would not appear anymore.
Merge pull request #48 from coderaiser/patch-1

[ux,login][xs]: Set bigger height and width of the login window - thx to @coderaiser.
Merge branch 'master' of github.com:okfn/dataexplorer
Merge branch 'master' into gh-pages