Improve output: distinguish between failed assertions (failures) and unexpected exceptions (errors), and print a filtered stack trace for any exception.

webapp/web/src/widget/templates/HtmlResizableTextarea.html

@@ -0,0 +1,14 @@
+<div>
+	<div style="border: 2px solid black; width: 90%; height: 200px;"
+		dojoAttachPoint="rootLayoutNode">
+		<div dojoAttachPoint="textAreaContainerNode" 
+			style="border: 0px; margin: 0px; overflow: hidden;">
+		</div>
+		<div dojoAttachPoint="statusBarContainerNode" class="statusBar">
+			<div dojoAttachPoint="statusLabelNode" 
+				class="statusPanel"
+				style="padding-right: 0px; z-index: 1;">drag to resize</div>
+			<div dojoAttachPoint="resizeHandleNode"></div>
+		</div>
+	</div>
+</div>