[CSYS] Bug Fixes for November 2018

A few small changes to the SHIFT and ASSAULT effects.

CSYS Update #1554 - Bug Fixes

GLaDOS
- Reported in +bbread 4/58 Fixed a bug where successfully interrupting with a SHIFT COUNTER or SHIFT REFLECT would not grant the SHIFT bonus. Note that gaining the shift bonus on failed interrupts is working as intended, so no change with regards to that part. - Reported in +bbread 4/59 Fixed a bug where partial ASSAAULT bonuses were granting the full ASSAULT bonus. Thanks for the reports! -GLaDOS