Fixed databinding "rollback" issues with guards.
Fixed databinding "rollback" issues with guards.

BlueSpire/Durandal,BlueSpire/Durandal,mryellow/Durandal,davismj/Durandal,davismj/Durandal,BlueSpire/Durandal,rwhepburn/Durandal,davismj/Durandal,Craga89/Durandal,BlueSpire/Durandal,rwhepburn/Durandal,mryellow/Durandal,rwhepburn/Durandal,mryellow/Durandal,mryellow/Durandal,davismj/Durandal,Craga89/Durandal,Craga89/Durandal,rwhepburn/Durandal,Craga89/Durandal