Continued iterating on calculations, added failing test for bugs found

app/imports/ui/properties/forms/shared/ComputedField.vue

@@ -0,0 +1,29 @@
+<template lang="html">
+  <div class="computed-field">
+    <text-field
+      :value="model.calculation"
+      v-bind="$attrs"
+      @change="(value, ack) => $emit('change', {path: ['calculation'], value, ack})"
+    />
+    <calculation-error-list :errors="model.errors" />
+  </div>
+</template>
+
+<script>
+import CalculationErrorList from '/imports/ui/properties/forms/shared/CalculationErrorList.vue';
+
+export default {
+  components: {
+    CalculationErrorList,
+  },
+  props: {
+    model: {
+      type: Object,
+      default: () => {},
+    },
+  },
+}
+</script>
+
+<style lang="css" scoped>
+</style>