XWIKI-22345: XWiki Syntax guide vertical menu links are unexpectedly underlined (#3298)

* Extended the ruleset to encompass all vertical menus generated by the menu macro instead of just the user menu.

xwiki-platform-core/xwiki-platform-flamingo/xwiki-platform-flamingo-skin/xwiki-platform-flamingo-skin-resources/src/main/resources/flamingo/less/general.less

@@ -179,7 +179,7 @@ body {
       & .xtree, // Do not underline links in livetables
       & .xwikitabbar, // Do not underline links in the tab bar. An example of this is the one containing document metadata at the bottom of ny doc.
       & .buttonwrapper, // Do not underline links that are inside buttonwrapper. Those will be styled like buttons and we want to keep their style consistent with buttons.
-      & #user-menu-col, // In the user profile, do not underline the menu items.
+      & .vertical-menu, // In vertical menus (user menu, syntax guide, ...), do not underline the menu items.
       & .jstree-xwiki, // Do not underline links in jstrees
       & .xwiki-livedata .cell .displayer-link, // Do not underline links that are in their own livedata cell
       & .xwiki-livedata .cell .breadcrumb // Do not underline links that are in breadcrumbs in livedatas