Bug 1074224 - removing all [role="button"] CSS rules from shared buttons building blocks.
Bug 1074224 - removing all [role="button"] CSS rules from System app.
Bug 1074224 - removing all [role="button"] CSS rules from dev_apps.
Bug 1074224 - removing all [role="button"] CSS rules from SMS app.
Bug 1074224 - removing all [role="button"] CSS rules from Settings app.
Bug 1074224 - removing all [role="button"] CSS rules from Calendar app.
Bug 1074224 - removing all [role="button"] CSS rules from Bluetooth app.
Merge pull request #24703 from yzen/bug-1074224

Bug 1074224 - removing all [role="button"] CSS rules.