Profiler: Make the RunningProcessesModel actually sortable

GUI::TableView looks at data(Model::Role::Sort) to know which order
things should be in.

DevTools/Profiler/RunningProcessesModel.cpp

@@ -116,6 +116,20 @@ GUI::Variant RunningProcessesModel::data(const GUI::ModelIndex& index, Role role
         ASSERT_NOT_REACHED();
     }
 
+    if (role == Role::Sort) {
+        switch (index.column()) {
+        case Column::Icon:
+            return {};
+        case Column::PID:
+            return process.pid;
+        case Column::UID:
+            return process.uid;
+        case Column::Name:
+            return process.name;
+        }
+        ASSERT_NOT_REACHED();
+    }
+
     return {};
 }