Fix CSS rule for selected and hovered items in the source sidebar

Author: GuillaumeGomez

src/librustdoc/html/static/css/themes/ayu.css

@@ -629,11 +629,11 @@ kbd {
 	color: #fff;
 	border-bottom-color: #5c6773;
 }
-div.files > a:hover, div.name:hover {
+#source-sidebar div.files > a:hover, div.name:hover {
 	background-color: #14191f;
 	color: #ffb44c;
 }
-div.files > .selected {
+#source-sidebar div.files > .selected {
 	background-color: #14191f;
 	color: #ffb44c;
 }

src/librustdoc/html/static/css/themes/dark.css

@@ -499,10 +499,10 @@ kbd {
 #source-sidebar > .title {
 	border-bottom-color: #ccc;
 }
-div.files > a:hover, div.name:hover {
+#source-sidebar div.files > a:hover, div.name:hover {
 	background-color: #444;
 }
-div.files > .selected {
+#source-sidebar div.files > .selected {
 	background-color: #333;
 }
 

src/librustdoc/html/static/css/themes/light.css

@@ -483,10 +483,10 @@ kbd {
 #source-sidebar > .title {
 	border-bottom-color: #ccc;
 }
-div.files > a:hover, div.name:hover {
+#source-sidebar div.files > a:hover, div.name:hover {
 	background-color: #E0E0E0;
 }
-div.files > .selected {
+#source-sidebar div.files > .selected {
 	background-color: #fff;
 }