Fix debugger quit for http handler functions

[Cartmanishere]

Fixes #689

In the break function, we reset the :skip in STATE when the debuggable function is called again.
This is checked using the coor as follows --

(if-let [first-coor @(:session-id STATE__)]
    (when (= first-coor coor)
      (reset! (:skip STATE__) false)
    (reset! (:session-id STATE__) coor))

But in case of functions called via HTTP --

• We skip breakpoints not using the STATE__ but by setting *skip-breaks* atom as {:mode :all}.
• Hence along with resetting STATE__ on function being called again, we also need to reset the *skip-breaks* atom.

This fixes the behavior of :continue-all and :quit commands for functions being called via HTTP.

[bbatsov]

Can you also add some explanatory comments here, so this part of the code is easier to understand for future readers?

[Cartmanishere]

Sure, I'll add comment.

[bbatsov]

Great catch! I'm sure that a lot of people will be thrilled by this fix.

[bbatsov]

Thanks!