Make open notebook input field full width

at `xxl` it was breaking out of the modal box container
Switch folder icon to new design's
Merge pull request #971 from twosigma/ildipo/minorstuff

expose evaluator id to output display
Whitespace Cleanups
Add the bootstrap `navbar-inverse` class

Allows for more out-of-the-box typography selectors
Display current filename in header

Finishes #923
Merge pull request #975 from twosigma/jb/more-fixes

Display current filename in header
Partially fix Issue #980 by using %* to pass command-line arguments from the launcher command through to the java server
Merge pull request #983 from twosigma/spot/980

Partially fix Issue #980 by using %* to pass command-line arguments from...
add to test: add cell and set its language to python. add IDs to the insert cell button and the language menu and its items
enter code into the codemirror and evaluate it, check the result
Merge pull request #985 from twosigma/spot/e2e-tests

Spot/e2e tests