The close button for the help window seems to be easily lost

In the office we usability tested the close button on the help window - seems like everyone missed the chevron on the left. The window feels like it is stuck open.

Repro steps
Open any pxt, I used arcade
Drag out a block
Right click on the block, choose help
Now try to get rid of the modeless dialog that appears.

Results
Everyone naturally went to the (open external tab) to try to close it. In my pxt I have worked around this by styling the chevron to attract attention..

--

Not suggesting you take my fix, but I did put the same shadow for the handle under the toggle button so it looks like it is actually part of the window. Then I made it a horrid orange. Still debating that one. 🤔

Adding standard close (x) next to the open external might be better.

/** the default toggle isnt visible enough to see the close mechanism*/
#sidedocsframe-wrapper {
    border: 2px solid #2b3550;
}
#sidedocstoggle {
    background: #d7674e;
    z-index: 999;
    opacity: 1;
    box-shadow: 0px 0px 20px 0px rgba(0, 0, 0, 0.41) !important;
}

No source file or test is named. Reproduce the help-window flow, then search for the sidedocsframe-wrapper and sidedocstoggle styles and the help dialog entry point. Done means the modeless help window has an obvious, usable way to close and the relevant UI tests or manual reproduction confirm it.