Reload file info after mark-save/mark-remove

[joelim-work]

• Fixes [BUG] mark-save jumps to mark-load on this situation #1541

Steps to reproduce for mark-save:

1. Create an error message (e.g. :echoerr foo)
2. Press m to perform mark-save, and create a mark

Steps to reproduce for mark-reload:

1. Create an error message (e.g. :echoerr foo)
2. Press " to perform mark-reload, and remove an existing mark

Both scenarios continue to display the old error message, which I think is a mistake. Note that for both scenarios, using :mark-save/:mark-reload directly won't reproduce the issue, since the read command loads loads the file info, clearing the error message.