page.sendEvent('keypress', "asdf"); - Not working on flash page

[steveeakin]

versions

• SlimerJS: 1.0.0
• Firefox: 59.03
• Operating system: MacOS 10.13.4

Steps to reproduce the issue

1. Highlight textbox on a flash app (via mouse click event)
2. page.sendEvent('keypress', "abc");

Actual results:

No text is entered

Expected results:

Text should be entered - If I pause Slimer execution at this point, I can type on my keyboard and the element is populated as expected.

Yes, I know flash sucks -- but apparently people still use it and I gotta automate with it...