fix delete template
Merge branch 'master' of https://github.com/dmi3yy/evolution

# By Ilyas Ronef (4) and Thomas Jakobi (2)
# Via Ilyas (2) and others
* 'master' of https://github.com/dmi3yy/evolution:
  Wrong variable name introduced
  * Ditto.summary extender: The problem with text ending in a fragmented word was solved.
  * Ditto.summary extender: All the calls of “strpos” were replaced with “mb_strpos” ones.
  * Ditto.customsort extender: Just minor code style changes.
  + The Ditto extender “Customsort” has been added.
  Missing calendar icon