Various tweaks and bug fixes.
'Clear All' button added to channel editor.
Closing the analyzer now exits the analyzer function
XVFO A-Channel fixed defaulting back to 1234.56789
Ability to set the user side button names in settings
* This only changes the name displayed on the button, it doesn't change the button's function.
Adjusted the colour selectors in settings so they are easier to open.
Added warning popup when PTT is pressed while TX Lock is active.
Fixed crash when attempting to change XVFO preset when the list is empty.
Fixed battery level showing over 100%