Fix workflow select components which use objects as options and take initial state from API

packages/builder/src/components/workflow/SetupPanel/ParamInputs/ModelSelector.svelte

@@ -2,12 +2,19 @@
   import { backendUiStore } from "builderStore"
 
   export let value
-  let modelId = value ? value._id : ""
-  $: value = $backendUiStore.models.find(x => x._id === modelId)
+  $: modelId = value ? value._id : ""
+
+  function onChange(e) {
+    value = $backendUiStore.models.find(x => x._id === e.target.value)
+  }
 </script>
 
 <div class="block-field">
-  <select class="budibase__input" bind:value={modelId}>
+  <select
+    class="budibase__input"
+    value={modelId}
+    on:blur={onChange}
+    on:change={onChange}>
     <option value="">Choose an option</option>
     {#each $backendUiStore.models as model}
       <option value={model._id}>{model.name}</option>

packages/builder/src/components/workflow/SetupPanel/ParamInputs/RecordSelector.svelte

@@ -3,8 +3,12 @@
   import { Input, Label } from "@budibase/bbui"
 
   export let value
-  let modelId = value && value.model ? value.model._id : ""
-  $: value.model = $backendUiStore.models.find(x => x._id === modelId)
+  $: modelId = value && value.model ? value.model._id : ""
+  $: schemaFields = Object.keys(value && value.model ? value.model.schema : {})
+
+  function onChangeModel(e) {
+    value.model = $backendUiStore.models.find(x => x._id === e.target.value)
+  }
 
   function setParsedValue(evt, field) {
     const fieldSchema = value.model.schema[field]
@@ -17,7 +21,11 @@
 </script>
 
 <div class="block-field">
-  <select class="budibase__input" bind:value={modelId}>
+  <select
+    class="budibase__input"
+    value={modelId}
+    on:blur={onChangeModel}
+    on:change={onChangeModel}>
     <option value="">Choose an option</option>
     {#each $backendUiStore.models as model}
       <option value={model._id}>{model.name}</option>
@@ -25,10 +33,10 @@
   </select>
 </div>
 
-{#if value.model}
+{#if schemaFields.length}
   <div class="bb-margin-xl block-field">
     <Label small forAttr={'fields'}>Fields</Label>
-    {#each Object.keys(value.model.schema) as field}
+    {#each schemaFields as field}
       <div class="bb-margin-xl">
         <Input
           thin