tag: update name of two templates
xfd: add tooltip to "reason" box

To explain that the reason is automatically signed and that wikitext is
usable in the reason.
Per request at WT:TW.
speedy: switch CSD log to use append()

Hopefully this should speed things up for those who use CSD logging.
Also fix line breaks at end of intro text.
Use 'Only warning' prefix on custom 4im templates
Merge pull request #171 from jackmcbarn/master

Use 'Only warning' prefix on custom 4im templates
Minor changes (disallow fallthrough, use strict equality)
Merge branch 'furme' of https://github.com/azatoth/twinkle