Add description support for asset properties and update related models

src/main/resources/templates/create_asset.html

@@ -6,7 +6,7 @@
 			<h2 th:text="${d.displayName}"></h2>
 			<table border="1" cellpadding="4">
 				<tr th:each="p : ${d.getProperties()}">
-					<td bgcolor="#d3d3d3"><b><label th:text="${p.displayName}" th:for="${d.asString(p)}"></label></b></td>
+					<td bgcolor="#d3d3d3"><b><label th:text="${p.displayName}" th:for="${d.asString(p)}" th:title="${p.description}"></label></b></td>
 					<td th:switch="${p.type.nameOrEnum()}">
 						<span th:case="STRING">
 							<select th:if="${p.inputList}" th:id="${d.asString(p)+'-list'}" th:name="${d.asString(p)+'-list'}">