moved t function to global and misc cleanup

ayanova/src/components/date-time-control.vue

@@ -29,7 +29,7 @@
           >
             <v-spacer></v-spacer>
             <v-btn text color="primary" @click="dlgdate = false">{{
-              t("OK")
+              $ay.t("OK")
             }}</v-btn>
           </v-date-picker>
         </v-dialog>
@@ -62,7 +62,7 @@
           >
             <v-spacer></v-spacer>
             <v-btn text color="primary" @click="dlgtime = false">{{
-              t("OK")
+              $ay.t("OK")
             }}</v-btn>
           </v-time-picker>
         </v-dialog>
@@ -105,11 +105,6 @@ export default {
     },
     testId: String
   },
-  methods: {
-    t(tKey) {
-      return window.$gz.translation.get(tKey);
-    }
-  },
   watch: {
     date() {
       //this tortuous fuckery is required so that the input and change events only fire on a real change, not initial page load