[Feature Request] Enable usage with notimeout set

[ferguscollins]

Is your feature request related to a problem? Please describe.
I don't want to wait to be able to remember what keys I need to press and would prefer to see the guide immediately upon leader-press. To do this currently, timeout and timeoutlen=0 must be set which prevents all non-leader key combinations from being used as they instantly time out, making most of Vim's features unusable.

Describe the solution you'd like
If notimeout is set, immediately open the guide window upon leader press.

Describe alternatives you've considered

1. If notimeout is set, wait a period of time specified by a plugin variable before opening the guide window, e.g. g:notimeout_guide_delay.
2. The current situation where the plugin is unusable if notimeout is set.

[liuchengxu]

You can't use this plugin with set notimeout, see https://github.com/liuchengxu/vim-which-key#requirement.

[ferguscollins]

Yes I am aware you currently can not use it with notimeout set, this is a feature request to enable the functionality described which is not currently offered by the plugin.

[liuchengxu]

That's not possible to my knowledge.

[ferguscollins]

If notimeout is what prevents this, then another alternative could be to also allow global commands to be viewed in the guide window similar to #171.