we don't use wscrl (even though redraw_window could gain some speed by calling wscrl in some contexts)

* reword in first tip * mention the keys for load-url * link the online version of the manpage

After a talk with tgl (thanks!) about defaults, I'm convinced this is a sensible default. For people who don't like colours (myself included), telescope will honour the `NO_COLOR' env variable. Then there is also the set enable-colors = 0 for the config file. We could go further and provide a flag like -O var=value to set some values without the need for a config file eventually.