explicitly set the file types to delete

the wild card version can get mixed up with app.del  '/project/:project_id/contents/*', httpAuth, TpdsController.deleteProjectContents
Merge branch 'master' of https://github.com/sharelatex/web-sharelatex
Only ignore hidden files from Dropbox, not GitHub
Disable hotkeys for layout panels since they interfere with text editing
Append spell check menu to body so it isn't hidden by PDF view resizer
Get subscription status correctly for showing upgrade/bonus link
renamed variable
allow ace to scoll off screen
added chinese flags in
handle a null in the file refs list

this seems to happen now and then when there is networking issues
added null check to where we insert elements into a project
added file ref null check
wiki will try and get spanish version of page then fall back to english if it is not there
fixed badly called flushProjectToThirdPartyDataStore causing issues with initial drobox sync
added chinese flags under cn
Merge remote-tracking branch 'upstream/master' into ldap-auth