ModelViewer:  * The load model buttons were not re-enabling after a refresh on FireFox.   * The redraw call happened before the last resource was loaded.
ModelViewer:
 * The load model buttons were not re-enabling after a refresh on FireFox. 
 * The redraw call happened before the last resource was loaded.

errordeveloper/fe-devel,errordeveloper/fe-devel,chbfiv/fabric-engine-old,chbfiv/fabric-engine-old,chbfiv/fabric-engine-old,errordeveloper/fe-devel,chbfiv/fabric-engine-old,chbfiv/fabric-engine-old,errordeveloper/fe-devel,errordeveloper/fe-devel,errordeveloper/fe-devel,chbfiv/fabric-engine-old,errordeveloper/fe-devel,chbfiv/fabric-engine-old