Fix Uncaught TypeError: Cannot read properties of null (reading 'app_obj') when clicking a project title.

onclick for nextmatch rows was not getting re-parsed for each row, so it was trying with the original widget from the template instead of the one from the row.
Also accepting widget as argument into compiled legacy code and using it over original context so we don't need to re-compile for each row.

api/js/etemplate/Et2Widget/Et2Widget.ts

@@ -1412,6 +1412,16 @@ function transformAttributes(widget, mgr : et2_arrayMgr, attributes)
 				}
 				break;
 			case Function:
+				if(typeof attrValue == "string" && mgr.getPerspectiveData().row == null &&
+					(attrValue.indexOf("$row") > -1 || attrValue.indexOf("$row_cont") > -1)
+				)
+				{
+					// Need row context, defer it until later
+					// Repeating rows & nextmatch will parse it again when doing the row
+					widget.deferredProperties[attribute] = attrValue;
+					console.log("Had to defer %s parsing for %o\nCan it be rewritten to avoid $row & $row_cont?", attribute, widget);
+					break;
+				}
 				// We parse it into a function here so we can pass in the widget as context.
 				// Leaving it to the LitElement conversion loses the widget as context
 				if(typeof attrValue !== "function")

api/js/etemplate/et2_core_legacyJSFunctions.ts

@@ -111,7 +111,8 @@ export function et2_compileLegacyJS(_code, _widget, _context)
 
 	// Execute the code and return its results, pass the egw instance and
 	// the widget
-	return function(ev) {
+	return function(ev, widget?)
+	{
 		// Dump the executed code for debugging
 		egw.debug('log', 'Executing legacy JS code: ', _code);
 
@@ -120,7 +121,7 @@ export function et2_compileLegacyJS(_code, _widget, _context)
 			egw.debug('warn', 'Legacy JS code only supports 2 arguments (event and widget)', _code, arguments);
 		}
 		// Return the result of the called function
-		return func.call(context, ev, _widget);
+		return func.call(context, ev, widget || _widget);
 	};
 }
 

api/js/etemplate/et2_extension_nextmatch_rowProvider.ts

@@ -170,7 +170,8 @@ export class et2_nextmatch_rowProvider
 			let widget = entry.widget;
 
 			// Parse the attribute expressions
-			var data : any = {};
+			let data : any = {};
+			let attributes = entry.data.map(attr => attr.attribute);
 			for(var j = 0; j < entry.data.length; j++)
 			{
 				var set = entry.data[j];
@@ -216,8 +217,17 @@ export class et2_nextmatch_rowProvider
 			// Adjust data for that row
 			widget.transformAttributes?.call(widget, data);
 
+			// Make sure to only send detached attributes, filter out any deferredProperties
+			let filtered = widget.deferredProperties ? Object.keys(data)
+				.filter(key => attributes.includes(key))
+				.reduce((obj, key) =>
+				{
+					obj[key] = data[key];
+					return obj
+				}, {}) : data;
+
 			// Call the setDetachedAttributes function
-			widget.setDetachedAttributes(nodes, data, _data);
+			widget.setDetachedAttributes(nodes, filtered, _data);
 		}
 
 		// Insert the row into the tr