for regular IdCollections when loading a record make the record a copy of the existing record first (adresses some incomplete records in some content files)
do not render deleted exterior cells in scene view
update paged scene view according to changes made to cell records
added missing combat, magic and stealth columns for creatures (Feature #1312)
interpret empty filter strings as no filter instead of a broken filter (Fixes #1311)
Merge branch 'editorfixes'