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

trentmillar/ddp-level-editor,trentmillar/ddp-level-editor,ryanramage/svg-editor,ryanramage/svg-editor,trentmillar/ddp-level-editor,ryanramage/svg-editor