feat(tpl): add hover style for list item

This makes hovers on inner control(delete) button also highlights the
whole item.

Author: marjune163

src/tpl/assert/main.css

@@ -204,6 +204,10 @@ em {
 	zoom: 1;
 }
 
+.item-list li:hover {
+	background: #f5f5f5;
+}
+
 .item-list a {
 	display: flex;
 	flex-flow: row nowrap;

src/tpl/assert/main.css.go

@@ -175,6 +175,9 @@ margin: 1em;
 position: relative;
 zoom: 1;
 }
+.item-list li:hover {
+background: #f5f5f5;
+}
 .item-list a {
 display: flex;
 flex-flow: row nowrap;