Lines increasing and decreasing indent no longer go below zero

Normally a line matched by both patterns will be decreased by one unit compared to the non-ignored lines immediately above and below. If however the line above was not indented, the line would in theory be decreased to -1 and thus just go back to zero indent for the line following it.
Allow home/end in filter lists

This goes to the first/last item and can be reached with fn-←/→ on laptop keyboards.