GUI -- Updated Equalize Master glyph. SVG practice progress - better algorithm for changing button position. Various other small edits.

Change-Id: I4d04a31b3cf5b329b2227c6ccf494de0b5603455
diff --git a/web/gui/src/main/webapp/_bripc/svg-exercise.html b/web/gui/src/main/webapp/_bripc/svg-exercise.html
index 3952b6c..785a3a7 100644
--- a/web/gui/src/main/webapp/_bripc/svg-exercise.html
+++ b/web/gui/src/main/webapp/_bripc/svg-exercise.html
@@ -42,6 +42,7 @@
         .button {
             fill: #369;
             /* TODO: figure out why svg filters are not working */
+            /* is it because there is an invisible rectangle behind it? */
             /*filter: url(#innerbevel);*/
         }
         svg text {