Redmine

As reported in #30459, Redmine 4.0 and later no longer supports the accesskey "r" (updates the preview in editor mode) due to the improvement of UI made by #27758.

The definition of the accesskey should be removed.

diff --git a/lib/redmine/access_keys.rb b/lib/redmine/access_keys.rb
index db66c7d84..a64ac0673 100644
--- a/lib/redmine/access_keys.rb
+++ b/lib/redmine/access_keys.rb
@@ -22,7 +22,6 @@ module Redmine
     unless const_defined?(:ACCESSKEYS)
       ACCESSKEYS = {
         :edit => 'e',
-        :preview => 'r',
         :quick_search => 'f',
         :search => '4',
         :new_issue => '7',