NOTHING ever stands still at Chelsea, in fact, there’s always been a “self destruct” button hidden deep in the bowels of Stamford Bridge, going way, way back to Edwardian times. Just consider: a manager walking on the roof of the stand, apparently drunk; Tommy Docherty’s antics and the infamous Blackpool incident; the Osgood and Hudson affair; Eddie McCreadie resigning after taking the club back to the top flight; needless relegation in 1988 amid rumours of player unrest; Mourinho 1.0’s departure; sacking Di Matteo just months after winning the Champions’ League; disposing of  Ancelotti 12 months after the double – you could go on and on. In modern times, the Abramovich era has been characterised by manager turnover at an alarming rate, but at the…