71ec3f03fb
The poll() callbacks used in the Text Editor for scrolling and text- block unlinking operators were too restrictive when the text block was lib-data. - Scrolling lib-linked texts is useful for just checking out parts of the linked-in file that aren't visible on screen already. For example, checking the specific rig that some UI panels script will work on, or reading a "README.txt" linked in with notes on which layers various controls are on. It should be fine that this temporarily modifies the linked text-block (but for view-settings which will can be reset later/on file load without any real consequences). - Unlink operator should be able to be run, otherwise it would be very difficult to remove linked files from a file (?)