Tweak SimpleRequestMixin to not rely on response.data.ok

instead just assume ok unless `response.data.error` is set

tailbone/templates/formposter.mako

@@ -47,10 +47,7 @@
 
                 this.$http.post(action, params, {headers: headers}).then(response => {
 
-                    if (response.data.ok) {
-                        success(response)
-
-                    } else {
+                    if (response.data.error) {
                         this.$buefy.toast.open({
                             message: "Submit failed:  " + (response.data.error ||
                                                            "(unknown error)"),
@@ -60,6 +57,9 @@
                         if (failure) {
                             failure(response)
                         }
+
+                    } else {
+                        success(response)
                     }
 
                 }, response => {