Added search by bus line
Proposed by Francesco Bonicelli
Completed by fabio.mazza
https://gitpull.it/T1199

Integrated collaborative translations thanks to Weblate
Completed by fabio.mazza
https://gitpull.it/T1275

Show info window in the map actually on top of bus marker
Resolved by fabio.mazza
https://gitpull.it/T1269
