Admin Flags: Internationalise the post-status-change label

[dd32]

When toggling a status in the Flag section, the toggle afterwards is missing the capitalisation, this is because it just sets the label afterwards to the command, rather than the textual label for it.

The attached patch adds internationalised Enable/Disable text which it switches in/out instead of using the command. It's hard-coded inline with the JS, as that's the format of the current JS and changing it up further probably deserves a rethink of the entire flagging UI and storage.

[ryelle]

Merged in ​6bd7068.