[ivette] fix: sidebar title css

ivette/src/dome/renderer/frame/style.css

@@ -103,6 +103,7 @@
       z-index: 10;
       padding: 5px;
       border-bottom: solid 1px var(--border-discrete);
+      background-color: var(--background-sidebar);
 
       .dome-xBoxes-hbox {
         max-width: 100%;