Add LDAP group membership management to the Directory modal, pin Groups sort bar, merge Directory columns

- Directory modal's Associated LDAP Groups tab now lets you view/add/remove
  members and owners of each associated group directly, reusing the same
  PUT/DELETE group/:group/:uid routes and member-mapping pattern already
  used on the Groups page -- no backend change needed.
- Groups page: the search/sort bar is now sticky, staying visible while
  scrolling through a long group list. Introduces --sw-content-offset (set
  in top.ejs alongside #spa-shell's margin-top) so an in-page sticky
  element can offset itself below the fixed navbar/update-banner instead
  of being hidden behind them at the viewport's true top:0.
- Directory table: Kind/Name/Env/Host merged into a single "Resource"
  column, matching the same information more compactly.
- app-base.js (byte-identical across the 3 apps): added app.util.revealItem(),
  which scrolls a just-added/-edited element into view and flashes its
  background -- wired into the Directory table, the Groups tab's member
  list, and the Groups page's create-group flow.
- Bumped @simpleworkjs/frontend to ^0.2.7 (published with the same
  revealItem() addition for any future consumer of its app.js, even though
  none of the 3 apps currently load that file directly -- they use the
  legacy app-base.js instead).

nodejs/public/lib/js/app-base.js

@@ -584,10 +584,31 @@ app.util = (function(app){
 		document.body.removeChild(element);
 	}
 
+	// Scroll a just-added/-edited element into view and flash its
+	// background, so the user's eye lands on the row that changed instead of
+	// it silently appearing/updating somewhere off-screen. Takes a jQuery
+	// object or a raw DOM node (e.g. jq-repeat's `item.__jq_$el`).
+	function revealItem(el){
+		var node = el && el.jquery ? el[0] : el;
+		if (!node) return;
+		if (typeof node.scrollIntoView === 'function') {
+			node.scrollIntoView({behavior: 'smooth', block: 'center'});
+		}
+		var prevTransition = node.style.transition;
+		var prevBg = node.style.backgroundColor;
+		node.style.transition = 'background-color 1.5s ease';
+		node.style.backgroundColor = 'var(--bs-success-bg-subtle, #d1e7dd)';
+		setTimeout(function(){
+			node.style.backgroundColor = prevBg;
+			setTimeout(function(){ node.style.transition = prevTransition; }, 1500);
+		}, 300);
+	}
+
 	return {
 		downloadFile: downloadFile,
 		getUrlParameter: getUrlParameter,
 		escapeHtml: escapeHtml,
+		revealItem: revealItem,
 	}
 })(app);