Bug 1018111 - [Flame][v1.4][MMS] Edit text messages, add video no size limit tips

you don't need to keep the `if` conditions because you changed all call sites to use the object (and that's good!)

So just use the object form without `if (l10n.id)` and it should be better!

I also prefer if you use a parameter `opts` with properties `l10nId` and `l10nArgs` because it's more explicit in the call sites.