[feature request] : lock the mode (small dot, big dot, or IO speed)

[benintech]

Great extension
But would it be possible to add a setting to lock the mode (small dot, big dot, or IO speed). I like the small dot, but sometimes I inadvertently click on it, then I have to click again 2 times to get my small dot back.
Would be great if we could lock it once and for all.