Remove Application filter because MetroFirefox is discontinued (#104)
Merge branch 'master' of git://github.com/mozilla/mozmill-dashboard into updateFilterCategories

Conflicts:
	_attachments/templates/addons_reports.mustache
	_attachments/templates/endurance_charts.mustache
	_attachments/templates/endurance_reports.mustache
	_attachments/templates/functional_failure.mustache
	_attachments/templates/functional_failures.mustache
	_attachments/templates/functional_reports.mustache
	_attachments/templates/l10n_reports.mustache
	_attachments/templates/remote_failure.mustache
	_attachments/templates/remote_failures.mustache
	_attachments/templates/remote_reports.mustache
	_attachments/templates/update_overview.mustache
	_attachments/templates/update_reports.mustache