Merge branch 'feature/2.4.0/allow_cross-project_subtasks' into 2.4.0-finn-master

app/models/issue.rb

@@ -151,9 +151,6 @@ class Issue < ActiveRecord::Base
         issue.fixed_version = nil
       end
       issue.project = new_project
-      if issue.parent && issue.parent.project_id != issue.project_id
-        issue.parent_issue_id = nil
-      end
     end
     if new_tracker
       issue.tracker = new_tracker
@@ -337,9 +334,7 @@ class Issue < ActiveRecord::Base
 
     # Checks parent issue assignment
     if @parent_issue
-      if @parent_issue.project_id != project_id
+      if !new_record?
-        errors.add :parent_issue_id, :not_same_project
-      elsif !new_record?
         # moving an existing issue
         if @parent_issue.root_id != root_id
           # we can always move to another tree

public/javascripts/application.js

@@ -336,7 +336,9 @@ function observeParentIssueField(url) {
                            paramName: 'q',
                            updateElement: function(value) {
                              document.getElementById('issue_parent_issue_id').value = value.id;
-                           }});
+                           },
+                           parameters: 'scope=all'
+                           });
 }
 
 function observeRelatedIssueField(url) {