adapt-contrib-spoor: android chrome zoom not working

[oliverfoster]

Subject of the issue

Need to remove the maximum-scale value from the viewport meta-tag throughout:
https://github.com/adaptlearning/adapt-contrib-spoor/blob/master/required/index.html#L11
https://github.com/adaptlearning/adapt-contrib-spoor/blob/master/required/index_lms.html#L7
https://github.com/adaptlearning/adapt-contrib-spoor/blob/master/required/scorm_test_harness.html#L8

Reference: #2569

[moloko]

derp, my bad for forgetting to amend these as well!

[NayanKhedkar]

😄
Pr: adaptlearning/adapt-contrib-spoor#196

[oliverfoster]

There's a secondary issue I'll do in a second. Scroll disable blocks zooming on notify and drawer fixed position elements.