Bug 1038984 - [L10n][Gallery] Clean up mozL10n.get uses in Gallery app

The video app uses 'nocard2-title', 'nocard3-text'. I suggest changing the video properties to use 'nocard3-title', 'nocard4-text'so the js can be shared. Or, change both video and gallery properties to use 'nocard-title/text' and change the js accordingly.