Optimize css for skin editor.

Http/SkinEditor/app.css

@@ -22,14 +22,14 @@ body {
 	cursor: pointer;
 }
 
-.tgbtn-active {
-	background-color: lightblue;
-}
-
 .tgbtn:hover {
 	background-color: lightgray;
 }
 
+.tgbtn-active, .tgbtn-active:hover {
+	background-color: lightblue;
+}
+
 #toolbar .tgbtn {
 	min-width: 64px;
 	height: 100%;
@@ -124,9 +124,6 @@ input {
 	width: 16px;
 }
 
-.t-statement > .btn {
-}
-
 .t-node:hover > .btn {
 	transition: 0.25s;
 	height: 16px;
@@ -267,12 +264,12 @@ input {
 		background-color: black;
 		color: white;
 	}
-	.tgbtn-active {
-		background-color: darkslateblue;
-	}
 	.tgbtn:hover {
 		background-color: gray;
 	}
+	.tgbtn-active, .tgbtn-active:hover {
+		background-color: darkslateblue;
+	}
 	.t-internal {
 		background-color: dimgray;
 	}