remove needless space character
Merge pull request #12271 from tlindig/modal_remove_needless_space

remove needless space character
Gruntfile.js: Fix `connect` base directory.
Move docs third-party libraries to a separate folder.
Update grunt-contrib-uglify dependency.
Update uglifyweb to use uglify-js v1.3.5.

Also fix its filename to reflect that it's not `uglify` but `uglifyweb`.