Diem 5.1.0-BETA1

The long awaited admin filters have been implemented. They appear as an ajax-powered "Advanced search", near to the smart search field.
The internal search engine now stores the page content, and displays it on search results instead of the page description meta.
You can now drag&drop non-image medias to the markdown editors: it generates a download link.
Url extensions lik ".htm" or ".html" are now supported.
And many bugs were fixed, as always, thanks to the high quality bug reports provided by the community!

Upgrade

Fully compatible with Diem 5.1.0-ALPHA1. Upgrade is recommended.

Highlights

View what changed since Diem 5.1.0-ALPHA1 on github
- improved is null input style
- added icons to cross-app links
- used dmString::strtolower in some place where multibytes chars may live
- added dmString::strtolower and use it in admin generator helper
- allow null values for date filters
- show number of applied filters
- added doc and french translations
- added a more intuitive filter date widget like the django one
- improved admin filters style
- added sfWidgetFormDmFilterDate and default configuration for it in dmDoctrineFormFilterGenerator
- fixed widget date class choice
- added doctrine form filter templates
- made doctrine filter generator use Diem templates, changed date widget
- removed static access to i18n service
- removed filtering models containing ToPrfx
- added admin form filters loaded with ajax. experimental.
- fixed translations syntax
- fixed sfException when using a language that symfony does not know
- made front javascript support dots in new page slugs
- fixed issue in dmString::urlize
- use dmString::urlize to preserve url extensions
- added new method dmString::urlize with unit tests
- removed some static service calls
- removed default alt for admin markdown dropped files, fixed blank space issue
- removed usage of static context getter
- made default search results template use stored page content
- made search index store page content instead of just indexing it
- fixed default robots.txt
- Added dropping non-image medias to markitdown