Latest public-side theme from upstream

git-svn-id: http://textpattern.googlecode.com/svn/development/4.x@5240 2fea6a4d-a838-0410-917b-93a53c48e9d2
Add note on flushing the browser cache when upgrading Textpattern

git-svn-id: http://textpattern.googlecode.com/svn/development/4.x@5241 2fea6a4d-a838-0410-917b-93a53c48e9d2
filedownloadurl() encodes the query components.

git-svn-id: http://textpattern.googlecode.com/svn/development/4.x@5242 2fea6a4d-a838-0410-917b-93a53c48e9d2
show_clean_test() doesn't resort on error suppression.

Uses identical operator for comparing what supposedly are
IP addresses.

git-svn-id: http://textpattern.googlecode.com/svn/development/4.x@5243 2fea6a4d-a838-0410-917b-93a53c48e9d2
Articles panel shows author's real name instead of login.

The login ID can be viewed by hovering over the name.

See issue #327

git-svn-id: http://textpattern.googlecode.com/svn/development/4.x@5244 2fea6a4d-a838-0410-917b-93a53c48e9d2
Remove exceeding whitespace from titles when saving.

This prevents article titles being rendered invisible in HTML
markup due to collapsing whitespace, and cleans up any
left-over bytes that likely shouldn't be there
(aka copy+paste scrap).

This scrap would otherwise also be used when constructing
the article URL. If title contains only whitespace characters,
this leads to the infamous percent encoded fallback URLs,
only consisting whitespace characters.

git-svn-id: http://textpattern.googlecode.com/svn/development/4.x@5245 2fea6a4d-a838-0410-917b-93a53c48e9d2
admin_title() defaults to 'Untitled', if $pagetitle is empty.

git-svn-id: http://textpattern.googlecode.com/svn/development/4.x@5246 2fea6a4d-a838-0410-917b-93a53c48e9d2
Use 'untitled' as title when editing an article without a title.

git-svn-id: http://textpattern.googlecode.com/svn/development/4.x@5247 2fea6a4d-a838-0410-917b-93a53c48e9d2
Files panel displays human-readable titles.

Lists category titles and uploader's real name instead of
the names. The name components can be viewed by
hovering over the column.

See issue #327

git-svn-id: http://textpattern.googlecode.com/svn/development/4.x@5248 2fea6a4d-a838-0410-917b-93a53c48e9d2
Merge remote-tracking branch 'upstream/master' into new-search-widget