UI: Disabled of removing items when FleetManagement is going on
ATC: Added support for removing from the context menu
UI: Status info is cleared when disconnecting
QML: Added capacity reading for battery percentage from roomba
UI: Removed IP address from virtual roombas

* Virtual Roombas are always connected also in UI
* Virtual Roombas have only "Rename" button instead of "Connect"
* Default naming of Roombas is now counting
ROOWIFI: FleetManager is not used when taking connection

* "Connect" doesn't now give incorrect messages "Please select one
Roomba!" in any case
UI: Disabled adding new roombas when connecting
UI: Correcting roombas location is disabled until connected
UI: Enabled adding roombas even when connected to one
QML: Fixed persentage calculation in Javascript
UI: Fixes to roombas status update and selecting the active tab
QML: Reset battery level on reset