Fix navbar toggle on small width

Add our own handler for collapse toggle since bootstrap toggle seems to
conflict with something
add btn-bavbar and set appropriate display attrs for smaller width in
responsive css file
Select all snapshots

Make select all snapshots work correctly
Fixes #436
Reset to first page of collection on successful delete multiple

Reset to first page of collection on successful delete multiple
to handle the case of the last page being deleted.
Removed settings.py since it is generated from settings.conf.in
Reset snapshot collection to prev page on multiple snapshot delete
Merge pull request #439 from sujeetsr/issue#386_navbar_responsive

Issue#386 navbar responsive