Editor: Keyboard shortcuts affect every open view
This issue can be problematic if the same key is used for multiple actions. Easily seen in "Editor: Delete instances via hotkey #2678 (closed)" at https://github.com/OpenMW/openmw/pull/2678 , when pressing delete-key with opened Cell view including selected cells, and Worldspace-view with selected instances will result in deleted cell as well as instances.
Depending on the approach, this can have multiple solutions. One possible solution is to clear selection from other views when one selection is altered (therefore only the last selection would be acted upon).