1. Auto select correct volume type when change snapshot
2. Show confirm modal when first change volume type used by snapshot
Change-Id: I37a70414e835c8c187ce5edd858b83c2273d5ca8
1. Add client module to request openstack api
2. Remove window.request, stores use client to request api
3. Remove window.globals, use globalRootStore to deal with user info
Change-Id: I5657cfd8cf142dbacce8716991f805bbbb4a9222