Fix Issue 280: Update layer list and Move To select box after moving elements.  Fix Issue 281: Make side panel resizable up to 300px, make default snap-open size 150px
Fix Issue 280: Update layer list and Move To select box after moving elements.  Fix Issue 281: Make side panel resizable up to 300px, make default snap-open size 150px

breity/svg-edit,breity/svg-edit,breity/svg-edit