Fixes for position of spectrum.
Fixes for position of spectrum.

Fix mirror when rect is used.
Fix vertical gradient to use all colors when mirror=1.
Fix x position when using reverse.

j-b-m/mlt,xzhavilla/mlt,anba8005/mlt,mltframework/mlt,siddharudh/mlt,j-b-m/mlt,j-b-m/mlt,anba8005/mlt,anba8005/mlt,mltframework/mlt,j-b-m/mlt,siddharudh/mlt,mltframework/mlt,siddharudh/mlt,xzhavilla/mlt,siddharudh/mlt,xzhavilla/mlt,anba8005/mlt,xzhavilla/mlt,j-b-m/mlt,xzhavilla/mlt,mltframework/mlt,j-b-m/mlt,siddharudh/mlt,anba8005/mlt,mltframework/mlt,mltframework/mlt,anba8005/mlt,mltframework/mlt,j-b-m/mlt,j-b-m/mlt,j-b-m/mlt,anba8005/mlt,j-b-m/mlt,xzhavilla/mlt,mltframework/mlt,anba8005/mlt,siddharudh/mlt,mltframework/mlt,siddharudh/mlt,xzhavilla/mlt,siddharudh/mlt,siddharudh/mlt,xzhavilla/mlt,anba8005/mlt,mltframework/mlt,xzhavilla/mlt