Removing files out of order deletes unintended file / folder name in watch list

[mreishman]

i.e. removing file 5 of 6 removes 6 when saved.

Fix: Update 6 to 5 when 5 is deleted

When number x is deleted, check if x is = to max num
if less than max num, update numbers from x to max number by -1, updating next number with -1 and total number with -1.