add vi-like `~' fringes after the end of the buffers

kill old, unused forward prototype for non-existant struct page

plug history memory leak when freeing a tab we have to release also its history.

allow to re-open closed tabs Save closed tabs to a "killed tabs" queue, for up to a max of "max-killed-tabs", and allow to re-open them. Keep the tab history but not its content. This integrates nicely with the session file, just add the "killed" flag as alias for TAB_KILLED and put it in the ktabshead queue upon initalization. It's thus possible to re-open closed tabs even after telescope has been closed, and tabs keeps their history! Add a new cmd, cmd_tab_undo_close, to try to re-open the most recently closed tab and bind it to `u'. While here, add a TODO for the tab history memory leak.

move know_host parsing to the fs process and load the store via imsgs Like previously did with the session file, now the main process doesn't parse anything with the only exception being the configuration file. With this in, the only bit from fs.h still used in the main process is the path to the configuration file.

avoid zero-timer hack by triggering session initialization with IMSG_INIT

implement persistent tab history The session file is now overloaded with the history info, that means that upon startup telescope can repopulate each tab history! The price to pay is that one can't start an old telescope with a new session file, otherwise will get a lot of fancy '<' and '>' tabs...

reuse struct session_tab when saving the session

move parse_last_session to the fs process ~/.telescope/session was parsed in the main process before dropping in the sandbox: that's no good. This moves the initialization of the ui events later in ui_main_loop and makes so that the fs process, after entering the sandbox, parses and sends the content of the last session back to the main process; when it's done the ui gets loaded and telescope is back rocking. I'm plannig to re-use the struct session_tab during the save session operation soon.

sort includes

extract keymap-related stuff to its own header

extract the key matching logic to its own function

switch to our new struct download for the downloads

add download and download.* line styles

add side window for downloads