Fix class cast exception in explorer dialogs

Author: Hanxiao Liu

PluginsAndFeatures/azure-toolkit-for-intellij/azure-intellij-plugin-appservice-java/src/main/java/com/microsoft/azure/toolkit/intellij/legacy/appservice/AppServiceInfoBasicPanel.form

@@ -3,7 +3,7 @@
   <grid id="27dc6" binding="contentPanel" layout-manager="GridLayoutManager" row-count="6" column-count="3" same-size-horizontally="false" same-size-vertically="false" hgap="-1" vgap="-1">
     <margin top="0" left="0" bottom="0" right="0"/>
     <constraints>
-      <xy x="20" y="20" width="417" height="180"/>
+      <xy x="20" y="20" width="417" height="204"/>
     </constraints>
     <properties/>
     <border type="none"/>
@@ -43,10 +43,11 @@
           <text value="Platform:"/>
         </properties>
       </component>
-      <component id="a4196" class="com.microsoft.azure.toolkit.intellij.legacy.appservice.platform.RuntimeComboBox" binding="selectorRuntime">
+      <component id="a4196" class="com.microsoft.azure.toolkit.intellij.legacy.appservice.platform.RuntimeComboBox" binding="selectorRuntime" custom-create="true">
         <constraints>
           <grid row="2" column="1" row-span="1" col-span="2" vsize-policy="3" hsize-policy="3" anchor="8" fill="1" indent="0" use-parent-layout="true"/>
         </constraints>
+        <properties/>
       </component>
       <component id="3e67" class="com.intellij.ui.TitledSeparator" binding="deploymentTitle">
         <constraints>

PluginsAndFeatures/azure-toolkit-for-intellij/azure-intellij-plugin-appservice-java/src/main/java/com/microsoft/azure/toolkit/intellij/legacy/appservice/AppServiceInfoBasicPanel.java

@@ -135,6 +135,7 @@ public RuntimeComboBox getSelectorRuntime() {
     private void createUIComponents() {
         // TODO: place custom component creation code here
         this.selectorApplication = new AzureArtifactComboBox(project, true);
+        this.selectorRuntime = new RuntimeComboBox();
     }
 
     public void setDeploymentVisible(boolean visible) {

PluginsAndFeatures/azure-toolkit-for-intellij/azure-intellij-plugin-appservice/src/main/java/com/microsoft/azure/toolkit/intellij/legacy/appservice/serviceplan/ServicePlanCreationDialog.form

@@ -27,18 +27,19 @@
           <text value="Name:"/>
         </properties>
       </component>
-      <component id="c8aa9" class="com.microsoft.azure.toolkit.intellij.common.AzureTextInput" binding="textName">
+      <component id="c8aa9" class="com.microsoft.azure.toolkit.intellij.common.AzureTextInput" binding="textName" custom-create="true">
         <constraints>
           <grid row="1" column="1" row-span="1" col-span="1" vsize-policy="3" hsize-policy="3" anchor="0" fill="1" indent="0" use-parent-layout="false"/>
         </constraints>
         <properties>
           <required value="true"/>
         </properties>
       </component>
-      <component id="75e4b" class="com.microsoft.azure.toolkit.intellij.legacy.appservice.serviceplan.PricingTierComboBox" binding="comboBoxPricingTier">
+      <component id="75e4b" class="com.microsoft.azure.toolkit.intellij.legacy.appservice.serviceplan.PricingTierComboBox" binding="comboBoxPricingTier" custom-create="true">
         <constraints>
           <grid row="2" column="1" row-span="1" col-span="1" vsize-policy="3" hsize-policy="3" anchor="0" fill="1" indent="0" use-parent-layout="false"/>
         </constraints>
+        <properties/>
       </component>
       <component id="a504e" class="com.intellij.ui.components.JBLabel" binding="labelDescription">
         <constraints>

PluginsAndFeatures/azure-toolkit-for-intellij/azure-intellij-plugin-appservice/src/main/java/com/microsoft/azure/toolkit/intellij/legacy/appservice/serviceplan/ServicePlanCreationDialog.java

@@ -104,4 +104,9 @@ public List<AzureFormInput<?>> getInputs() {
         return Collections.singletonList(this.textName);
     }
 
+    private void createUIComponents() {
+        // TODO: place custom component creation code here
+        this.textName = new AzureTextInput();
+        this.comboBoxPricingTier = new PricingTierComboBox();
+    }
 }

PluginsAndFeatures/azure-toolkit-for-intellij/azure-intellij-plugin-lib/src/main/java/com/microsoft/azure/toolkit/intellij/common/component/resourcegroup/ResourceGroupCreationDialog.form

@@ -19,7 +19,7 @@
           <text value="Name:"/>
         </properties>
       </component>
-      <component id="c8aa9" class="com.microsoft.azure.toolkit.intellij.common.component.resourcegroup.ResourceGroupNameTextField" binding="textName">
+      <component id="c8aa9" class="com.microsoft.azure.toolkit.intellij.common.component.resourcegroup.ResourceGroupNameTextField" binding="textName" custom-create="true">
         <constraints>
           <grid row="1" column="1" row-span="1" col-span="1" vsize-policy="3" hsize-policy="3" anchor="0" fill="1" indent="0" use-parent-layout="false"/>
         </constraints>

PluginsAndFeatures/azure-toolkit-for-intellij/azure-intellij-plugin-lib/src/main/java/com/microsoft/azure/toolkit/intellij/common/component/resourcegroup/ResourceGroupCreationDialog.java

@@ -69,4 +69,9 @@ public void setValue(final ResourceGroupDraft data) {
     public List<AzureFormInput<?>> getInputs() {
         return Collections.singletonList(this.textName);
     }
+
+    private void createUIComponents() {
+        // TODO: place custom component creation code here
+        this.textName = new ResourceGroupNameTextField();
+    }
 }