Update importing so we don't open every imported tiddler

Instead we just display a report with links to each imported tiddler.
Should make importing much faster.
Ensure that $:/isEncrypted is reset if modified
Merge pull request #426 from xcazin/fr-FR

Translation of recently added translateable strings.
Use import report tiddler only if more than one tiddler is imported

If there’s only one, just display the tiddler itself.
Allow the end of text to be treated as a linebreak for parsing HTML tags
Docs updates
Merge pull request #428 from xcazin/fr-FR

Change suffix tids to multids for 2 fr-translated multi tiddler files
Fix control panel modules tab
Convert @giffmex themes into colour palettes

Although there are some style changes in the existing themes they’re
mostly a matter of a changed palette.

@giffmex - I’ll send you a prerelease of 5.0.8 so that you can tweak
the palettes if you’ve got time.
Change SiteTitle/SiteSubtitle into $:/SiteTitle and $:/SiteSubtitle

To make things more consistent
Docs updates
Extend button widget to allow navigating to a tiddler

Fixes #327
More docs updates
Merge pull request #430 from xcazin/fr-FR

Corrections on fr-FR translation per Julie Strzelecki remarks.
Require that wiki folders have a tiddlywiki.info file

Previously, we were just using default content if the tiddlywiki.info
file was missing. This allowed us to do things like `tiddlywiki
—server` without actually being in a valid wiki folder.

Fixes #361
Tweaks to @giffmex's palettes
Docs updates