Update document title when loading a new track

[kmod-midori]

This updates the title to something more informative than "LMS" by including title and album in the title. The media session API should be mostly sufficient on most platforms, but does not work reliably (or at all) on my Edge browser, so I propose this change.

That <unk> is just a placeholder, I still need to figure out how to do i18n from JavaScript.

[epoupon]

Hello!
Thanks for proposing this. I guess it would be easier to do this from the cpp file (MediaPlayer.cpp), see wApp->setTitle https://www.webtoolkit.eu/wt/doc/reference/html/classWt_1_1WApplication.html#a71a3f7da5abb9a76df94fab69ba61670
But actually we should not bother with "unkown" strings and just skip them, as it is done in lms in general

[kmod-midori]

May I (shamelessly) ask you to convert these lines of code for me? I don't currently have a C++ development environment at hand (and I don't really know wt that well).

[epoupon]

Hi!
Well I have played a bit with this and I am afraid it messes the history: when navigating in the history we get irrelevant entries.
Other softwares (like apple music, deezer, etc.) just write what is being explored (like the artist name, the album name, etc.)
I have tested the latter and it is quite handy actually!

[kmod-midori]

Yeah, didn't consider that it messes with the browser history. Anyway, any information at all is better than just "LMS" :)

I will need to look further into why Edge's media information API does not work on any of my system though...