Fix #35261: double clicking the up arrow in the file browser to go up multiple
directories fast would start drag and drop. Disabled drag on those items now.

git-svn-id: https://svn.blender.org/svnroot/bf-blender/trunk/blender@56653 954f8c5b-7b00-dc11-b283-0030488c597c
Fix for #35291, Deleting 'Group Output' node in compositor causes Segfault. A group without an output node in compositor would leave the original Node instance in the graph with outgoing connections. This causes trouble because the Node is expected to be a NodeOperation. Now group nodes always get disconnected and if no output node is present will use the default group output values (which is slightly less confusing than using input values from connected nodes).

git-svn-id: https://svn.blender.org/svnroot/bf-blender/trunk/blender@56654 954f8c5b-7b00-dc11-b283-0030488c597c