message: Add some debugging around the recently DM'd users
  The suggestions are relatively stable, but the recents have some issues. Adding logging to the suggestions would also destroy the console log with thousands of messages whereas recents aren't too bad.
diff: @@ -338,19 +338,31 @@ export default class InviteDialog extends React.PureComponent {
  const recents = [];
  for (const userId in rooms) {
  // Filter out user IDs that are already in the room / should be excluded
  - if (excludedTargetIds.includes(userId)) continue;
  + if (excludedTargetIds.includes(userId)) {
  + console.warn(`[Invite:Recents] Excluding ${userId} from recents`);
  + continue;
  + }
  const room = rooms[userId];
  const member = room.getMember(userId);
  - if (!member) continue; // just skip people who don't have memberships for some reason
  + if (!member) {
  + // just skip people who don't have memberships for some reason
  + console.warn(`[Invite:Recents] ${userId} is missing a member object in their own DM (${room.roomId})`);
  + continue;
  + }
  const lastEventTs = room.timeline && room.timeline.length
  ? room.timeline[room.timeline.length - 1].getTs()
  : 0;
  - if (!lastEventTs) continue; // something weird is going on with this room
  + if (!lastEventTs) {
  + // something weird is going on with this room
  + console.warn(`[Invite:Recents] ${userId} (${room.roomId}) has a weird last timestamp: ${lastEventTs}`);
  + continue;
  + }
  recents.push({userId, user: member, lastActive: lastEventTs});
  }
  + if (!recents) console.warn("[Invite:Recents] No recents to suggest!");
  // Sort the recents by last active to save us time later
  recents.sort((a, b) => b.lastActive - a.lastActive);
  