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).

Signed-off-by: Jan-Christoph Ihrens <ihrens@cc-services.de>
Translated the rest of the new phrases of MODX 2.3.0-dev to German

Signed-off-by: Jan-Christoph Ihrens <ihrens@cc-services.de>
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