Bug 1160043: Added spinbox/slider in Prefrences->waveform to make end of
track user configurable. Currently, the timer ranges from 0 (no flash)
to 60 secs before the end of track.
Cleaning code a bit
Correcting for PR comments
Bug 1210846 Auto Reset Gain & Eq after each song

-Added a checkbox under preferences->equalizers for enabling Auto EQ/Gain
Reset
-If checked, resets the pregain, lowgain, midgain & highgain to defaults when a new
song is loaded
Merge remote-tracking branch 'mixxxdj/pr/352'

Conflicts:
	src/basetrackplayer.cpp
	src/basetrackplayer.h
	src/dlgprefeq.cpp
	src/dlgprefeqdlg.ui