Calling multiple calls less extension with images

[jcubic]

Issue summary

When you invoke term.less multiple times and one of them has images that are executed out of order. Also press q is broken.

Expected behavior

I should call more than one less with images and they should create a stack of a less views

Actual behavior

the one that has images that load slower is executed last, also the stack is probably corrupted.

Steps to reproduce

1. Open less demo
2. Add this code at the end:

term.less('Ken and Denis\n[[@;;;;https://raw.githubusercontent.com/jcubic/jquery.terminal/master/__tests__/Ken_Thompson__and_Dennis_Ritchie_at_PDP-11.jpg]]');

Browser and OS

NA