fix: CSS

Signed-off-by: WaitSpring <me@waitspring.com>

resources/ext.DarkMode.less

@@ -16,16 +16,15 @@
 	}
 
 	#darkModeButton {
-		cursor: pointer;
-		opacity: 0.7;
-		position: fixed;
-		right: 8px;
-		-ms-user-select: none;
-		-moz-user-select: none;
-		-webkit-user-select: none;
-		user-select: none;
-		width: 32px;
-		height: 32px;
+        position: fixed;
+        right: 8px;
+        width: 32px;
+        height: 32px;
+        cursor: pointer;
+        -ms-user-select: none;
+        -moz-user-select: none;
+        -webkit-user-select: none;
+        user-select: none;
 	}
 
 	/* START OF DARKMODE STYLES */