pretty print help lines

add other-window (C-x o) and allow focusing help buffer

move in_minibuffer too

reorder minibuffer stuff and while there also rename the bogus completing_read to minibuffer_read. To get a ``completing-read'' one has to call enter_minibuffer with the right parameters.

move help to its own file in order to do so, we also have to export some internal variables from ui (the width and height of the window). Not the best possible outcome, but are used only in recompute_help, and can be dropped later. Also, move wrap_page to wrap.c.

push-button-new-tab on relative URLs now works

keep the scrolling during a save-excursion

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.

keep track of the current tab and restore it after startup

retire current_tab() in favour of current_tab

add suspend-telescope

add -C/--colors: dumps all available colors

move some leftovers from ui.h to minibuffer.h

add M-t (tab-select); extend the completion API

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