coverity#708001 Uninitialized scalar field

Change-Id: Ib8985a3966af4baf3ceb9b46fa250677556afdca
coverity#707996 Uninitialized scalar field

Change-Id: I793e8753b941af768544d8082e8946f56122b54c
coverity#707995 Uninitialized scalar field

Change-Id: Idef908843df92bad5283d36c3412090dd3b7c709
map GtkSpinner to Throbber

Change-Id: I52eab374fbce2dd51a3ab12c4cff605f4cd7610d