Re-add sort by name to ML non-simple filter.

When replacing 'sort by extension' with
'sort by name' in simple filter mode, 'sort by name'
was erroneously removed from non-simple filter
mode too (and replaced by a second incarnation of
'sort by extension').

Signed-off-by: Thomas Hochstein <thh@inter.net>
Merge pull request #171 from th-h/issue-157

Re-add sort by name to ML non-simple filter (#157).
Add new img button to media chooser (plugins)
Show ML-Button after Ajax-Upload
It might be useful by not to smartify those buttons
fix: restore template sidebar settings (#164)
Back button for plugins
Prevent api to install unstackable plugins twice (#45)
correct approach to detect installed plugins (#45)
remove modifier

since moved to core and this template/theme is "Require Serendipity: 2.0"

References c46d07c and comments
dashboard entry publish keep timestamp - fixes and closes #160
document #160