Adding event to the middle mouse button click.

This is a continuation of https://github.com/modxcms/revolution/pull/449 in another realization. 
And prevent changes in the current window
Added soft remove processor
Fix unescaped backslash in file and image TV

Fix for #9526: http://tracker.modx.com/issues/9526
Modified getTree() to support options (like context) as getChildIds()/getParentIds()
CSS Twerks

Un-uglifying the required/invalid input state (now uses red border and
font awesome icon)
Adjusting x-panel table header hue (to $darkNeutral)
removing legacy green buttons in package manager (now $primary)
retina-tizing x-btn-split (Download Extras button)
uberbar result hovers (%nav-item)
Help Page Improvements

Retina CSS MODX Help Logo
Primary Action styling on sign up button
Update German lexicon topics

Merge remote-tracking branch 'origin/pr/694' into develop

* origin/pr/694:
  Translated the rest of the new phrases of MODX 2.3.0-dev to German
  Translated some of the new phrases for MODX 2.3.0 to German. Parts of topmenu.inc.php still have to be translated (will be done next week).
Merge remote-tracking branch 'origin/pr/696' into develop

* origin/pr/696:
  Help Page Improvements
  CSS Twerks
Fix error with package management caused by #691
Fix Mispositioned Tree Buttons in Firefox

Closes jpdevries/revolution#16
see screenshot, I still have no idea why an undefined class is being
added to the element twice
Fix issue where selecting search results did... nothing
Added IN output filter

Search inside comma delimited string. 

Example: [[*tv:IN=`blaat,test,value`:then=`Yes there is`:else=`No there isn't`]]
Add preg_quote to friendly_alias_word_delimiters characters

This allows you to add / as a friendly_alias_word_delimiter without breaking the regex
Fix loading of plugin events on Create Plugin screen
Fix tree button positions in Firefox

Merge remote-tracking branch 'origin/pr/699' into develop

* origin/pr/699:
  Fix Mispositioned Tree Buttons in Firefox
Fix issue where selecting search results did... nothing

Merge remote-tracking branch 'origin/pr/700' into develop

* origin/pr/700:
  Fix issue where selecting search results did... nothing
Add in/inarray conditional output filter

Merge remote-tracking branch 'origin/pr/702' into develop

* origin/pr/702:
  Added IN output filter
Fix loading of plugin events on Create Plugin screen

Merge remote-tracking branch 'origin/pr/704' into develop

* origin/pr/704:
  Fix loading of plugin events on Create Plugin screen
Implement auto-saving on Content Types grid