[Bug 992393][camera][madai] preview mode UI updates with UT

	modified:   apps/camera/style/preview-gallery.css

 On branch Bug992393_camera_madai_preview_mode_UI_updates
	modified:   apps/camera/index.html
	modified:   apps/camera/js/controllers/preview-gallery.js
	modified:   apps/camera/js/views/preview-gallery.js
	modified:   apps/camera/locales/camera.en-US.properties
	modified:   apps/camera/style/icomoon.json
	modified:   apps/camera/style/icons.css
	modified:   apps/camera/style/main.css
	modified:   apps/camera/style/preview-gallery.css
	modified:   apps/camera/test/unit/controllers/preview-gallery_test.js
	new file:   apps/camera/test/unit/views/preview-gallery_test.js