Fix sign/players toggle not appearing in non-overworld render views.

[derek-keeler]

Update javascript to load the 'Players / Signs' toggle element in the UI in all views.
Fixes #110

[stwalkerster]

This fix looks sensible enough to me and I'm happy to accept it as-is, though I'm unclear on what precisely was wrong for this to fix?

I don't think I've observed this in map renders I've done, and some of them make extensive use of the map markers with Overviewer config files reaching into the hundreds of lines of code.

[derek-keeler]

Interesting. I haven't been seeing signs be rendered in the Nether or End views for some time. When I began this work I wasn't seeing them (as per usual) and after the fix I now see them.

Have you been seeing sign markers in the Nether? That would be the first thing to look at on your end. Second thing I can think of is what your default browser / OS is? I use Firefox (dev nightly) on Windows. Perhaps that's the source of the trouble as well (this may not have manifested on Chrome, for example).

[stwalkerster]

My default browser is Firefox (stable, Linux), markers do indeed appear in the Nether and the End, though as I mentioned earlier there is some really complex config on that render for all the map functionality.

I'll just merge this since it seems safe and sensible enough, though I am really curious what's going on (either why it was broken for you, or why it worked fine for me).