EQ Fixes
analyser now disabled when not in view.
band vu meters now disable when analyser is disabled.
display nema changed to Equalizer.
set sample rate before frequency on LinkWitzRiley filters.
Grouped the setting of filterparameters into one function, and calc coefficent
 once if needed.
Made suitable function inline.
in and out vu meters now using both stereo channels
Merge pull request #1493 from curlymorphic/eq

EQ Fixes for 1443