Add a possibility to cancel searching of global used probes

YES!  or at least a prompt box to re-alert you that this devastating option was chosen.

Even moving the button or changing the color of it would help greatly!

Was it somehow considered? 

Typically the way it works, people will vote on topics - slowly as people move their votes around 'hot topics' float to the top and the team hexagon team tries to consider them.  If any action is started they typically will mark it as such.