Toggle switch to connect ON/OFF bluetooth device

[cedricoola]

Well, I found another way:

when I want to switch source from pc to smartphone: I don't touch anything on the pc and
- I turn off my speaker (through a button on my speaker)
- then I turn my speakers back on. It is now ready to be connected with my smartphone.

when I want to switch back to listen to my pc sound,
- I disconnect my smartphone in Android (to free the speaker) and
- I click on the Blueman-applet icon of the system tray, and in the menu I find my speaker in 'Recent connections'