Minimal button size

ubl-settings-repomanager.css

@@ -2,6 +2,7 @@
 	margin:0px;
 	padding:0px;
 }
+
 .noborder {
 	border:none;
 }
@@ -140,4 +141,9 @@ background:transparent;
 
 treeview row:nth-child(odd) { background-color: #000000; }
 
-treeview row:nth-child(even) { background-color: #ffffff; }
+treeview row:nth-child(even) { background-color: #ffffff; }
+
+button {
+	min-width: 26px;
+	min-height: 24px;
+}