Open chr files through non acceptable path and then use open recently

[RipleySometimes]

Invalid path triggers the message “loading character x…” that never progresses, the recent file loads in while the frozen loading message obscures the screen, the view port remains interact-able while the animation timeline does not. DSAS should either prevent users from loading in additional files via recent files or allow users to load in additional files while other files are uploading via file, open. To reproduce see the following steps: File, open, open invalid path for chr files, defocus error message, file, recent files, select valid path.