make search icons better.

Author: liuwenchao

demo/theme-shim.css

@@ -71,6 +71,8 @@
   line-height: 1;
   -webkit-font-smoothing: antialiased;
   -moz-osx-font-smoothing: grayscale;
+  min-width: 15px;
+  min-height: 20px;
 }
 #themed .hint:before {
   content:"\f05a";

demo/theme.css

@@ -71,6 +71,8 @@
   line-height: 1;
   -webkit-font-smoothing: antialiased;
   -moz-osx-font-smoothing: grayscale;
+  min-width: 15px;
+  min-height: 20px;
 }
 #themed::shadow .hint:before {
   content:"\f05a";

dist/aha-table.html

@@ -79,16 +79,20 @@
 				text-decoration: underline;
 			}
 			.arrow-up,
-			.arrow-down {
+			.arrow-down,
+			.search,
+			.nosearch {
 				width: 0; 
 				height: 0; 
 				border-left: 5px solid transparent;
 				border-right: 5px solid transparent;
 			}
-			.arrow-up {
+			.arrow-up,
+			.search {
 				border-bottom: 5px solid black;
 			}
-			.arrow-down {
+			.arrow-down,
+			.nosearch {
 				border-top: 5px solid black;
 			}
 			.copy-er, 
@@ -149,7 +153,7 @@
 							class="{{ selectable ? '' : 'hide'}}"/>
 						<div
 							title="{{searchtitle}}"
-							class="filterrow {{ searchable ? 'arrow-up' : 'arrow-down'}}"
+							class="filterrow {{ searchable ? 'search' : 'nosearch'}}"
 							on-click="{{ toggleFilters }}"></div>
 					</th>
 					<th template