Don't clear project name after opening a previewed file
Don't clear project name after opening a previewed file

After running the quick_open_file_history command, the name of the project
for which the history was fetched should still be preserved, since the
quick panel is still open, and a delete_file_history_entry command may
get executed, which requires access to the current project name. There is
no harm is not clearing project_name in __clear_context, so that is what
this fix does.

FichteFoll/FileHistory