When File System API is available, replace file when saving an already open file. User can change sheet title to force the file name picker dialog. Additionally, set unsavedChange and autosaveNeeded to false after save so that user is not warned about unsaved changes if navigating away from page without changes after save.
Fixes #238
When File System API is available, replace file when saving an already open file. User can change sheet title to force the file name picker dialog. Additionally, set unsavedChange and autosaveNeeded to false after save so that user is not warned about unsaved changes if navigating away from page without changes after save.