Commit Briefs
lazy loading tabs on startup
don't load all the tabs when starting up, only the current one. Defer the loading of the others when switching to them.
refactor struct vline
the new `meta.data' field will be useful for holding completions data.
support completions in minibuffer + related interactive fns
* cmd.c (cmd_previous_completion): add previous-completion (cmd_next_completion): add next-completion (cmd_insert_current_candidate): add insert-current-candidate * minibuffer.c (enter_minibuffer): support completions in minibuffer