tablet: don't disable the proximity timeout after a correct sequence
See this comment: #248 (comment 164756)
libinput currently disables the proximity timeout quirk once it sees a correct sequence. In the case of this device, sometimes the device sends the right sequence. This causes the subsequent sequences to be hung because we never trigger the proximity out.
Fixing this should be trivial, it's mostly an issue in fixing all the test cases to make sure they can handle this.