Feat: support new fields for meeting mode, proposed start date and duration.

As per title

app/views/staff.py

@@ -166,7 +166,7 @@ def edit_project(project_id):
                 shortlist_proposer(project)
             return redirect(url_for("staff.projects"))
         form = ProjectForm(obj=project)
-        form.meeting_mode.data = "remote" if project.is_remote == True else ""
+        form.meeting_mode.data = "remote" if project.is_remote is True else ""
         form.category.choices = [(c.code, c.name) for c in categories]
 
         if project.on_behalf is not None: