[Feature] Add aircraft count on tab

[Bartholomew22]

Add a count of aircraft on visible map similar to that of Piaware Skyaware page as seen on port 8080. This allows on to monitor counts from multiple sites without shifting focus to a specific page.

[RundesBalli]

sed --follow-symlinks -i -E 's/.*PlaneCountInTitle =.*/PlaneCountInTitle = true;/' /usr/local/share/tar1090/html/config.js

If you want the message rate also:

sed --follow-symlinks -i -E 's/.*MessageRateInTitle =.*/MessageRateInTitle = true;/' /usr/local/share/tar1090/html/config.js

After that, CTRL+F5 in the tab:

You're welcome