fixed the subform build, to allow required value to be set to true.

admin/models/forms/admin_custom_tabs.xml

@@ -119,7 +119,6 @@
 					class="fieldMedium"
 					multiple="false"
 					default="1"
-					required="false"
 					button="false"
 				/>
 				<!-- Position Field. Type: List. (joomla) -->
@@ -130,7 +129,6 @@
 					description="COM_COMPONENTBUILDER_ADMIN_CUSTOM_TABS_POSITION_DESCRIPTION"
 					class="list_class"
 					multiple="false"
-					required="false"
 					default="1">
 					<!-- Option Set. -->
 					<option value="1">
@@ -149,7 +147,7 @@
 					class="text_area"
 					readonly="false"
 					disabled="false"
-					required="false"
+					required="true"
 					filter="STRING"
 					message="COM_COMPONENTBUILDER_ADMIN_CUSTOM_TABS_NAME_MESSAGE"
 					hint="COM_COMPONENTBUILDER_ADMIN_CUSTOM_TABS_NAME_HINT"
@@ -160,7 +158,6 @@
 					name="permission"
 					label="COM_COMPONENTBUILDER_ADMIN_CUSTOM_TABS_PERMISSION_LABEL"
 					value="1"
-					required="false"
 					description="COM_COMPONENTBUILDER_ADMIN_CUSTOM_TABS_PERMISSION_DESCRIPTION"
 					class="inputbox"
 				/>
@@ -175,7 +172,7 @@
 					class="text_area tab_html"
 					filter="raw"
 					hint="COM_COMPONENTBUILDER_ADMIN_CUSTOM_TABS_HTML_HINT"
-					required="false"
+					required="true"
 				/>
 			</form>
 		</field>