fix(ui): units in selects and selects always sending 0 (#925)

src/components/ValueId.vue

@@ -119,6 +119,7 @@
         :return-object="false"
         :item-text="itemText"
         item-value="value"
+        :suffix="value.unit"
         :append-outer-icon="!disable_send ? 'send' : null"
         v-model="value.newValue"
         @click:append-outer="updateValue(value)"
@@ -143,6 +144,7 @@
         :hint="help"
         persistent-hint
         chips
+        :suffix="value.unit"
         :item-text="itemText"
         item-value="value"
         :type="value.type === 'number' ? 'number' : 'text'"
@@ -328,7 +330,10 @@ export default {
     updateValue (v, customValue) {
       // needed for on/off control to update the newValue
 
-      if (this.$refs.myCombo) {
+      if (
+        this.$refs.myCombo &&
+        this.$refs.myCombo.$refs.input._value !== null
+      ) {
         // trick used to send the value in combobox without the need to press enter
         this.value.newValue = this.$refs.myCombo.$refs.input._value
       }