Fixes in previous update

Added mode "slope change"

-Added 2 new modes: Over Signal (colored) and Over Level (colored). Used for histograms with 2 colors that give entries when they cross above certain signal/level. If the color changes when it's above the signal/level, that also creates an entry.

The color buffer selected in these modes is always the one next to main buffer (if main=1, the implicit color buffer would be always 2).

Minor text corrections

Minor fixes

Minor fixes