jsdialog: hover style for comment menu and context menu entries

 - Fixed low visibility of hover state in context and comment menus
 - Used an attribute selector [id^="comment-menu-"][id$="-entries"]
   to match every comment menu dropdown instead of a single id,
   since each comment generates its own suffix

Signed-off-by: Banobe Pascal <banobe.pascal@collabora.com>
Change-Id: Iddbf946a3a69a8146b088cf3ae277c20bfedff7d

Author: banobepascal

browser/css/jsdialogs.css

@@ -1450,6 +1450,12 @@ img.context-menu-icon {
 	background-color: var(--color-background-hover);
 }
 
+[id^='comment-menu-'][id$='-entries'] .ui-combobox-entry:hover,
+#jsd-context-menu-entries .ui-combobox-entry:hover {
+	background-color: var(--color-background-darker) !important;
+	color: var(--color-text-darker) !important;
+}
+
 .ui-combobox-entry.selected:not(:hover) span,
 .margin-item.selected {
 	background-color: var(--color-background-darker);