Improve sync info (#692)

- Fixed an edge case where disconnecting and then reconnecting would
retain outdated info
- Fixed an issue where new patches wouldn't immediately update the
change info text
- Removed extraneous changes count info, as it was not useful and could
be checked in the visualizer anyway
- Added warning info for when some changes fail to apply
- Updates timestamp of last sync even if patch was empty, to have a more
accurate signal on Rojo's uptime

plugin/src/PatchSet.lua

@@ -212,13 +212,24 @@ function PatchSet.countChanges(patch)
 	local count = 0
 
 	for _ in patch.added do
+		-- Adding an instance is 1 change
 		count += 1
 	end
 	for _ in patch.removed do
+		-- Removing an instance is 1 change
 		count += 1
 	end
-	for _ in patch.updated do
-		count += 1
+	for _, update in patch.updated do
+		-- Updating an instance is 1 change per property updated
+		for _ in update.changedProperties do
+			count += 1
+		end
+		if update.changedName ~= nil then
+			count += 1
+		end
+		if update.changedClassName ~= nil then
+			count += 1
+		end
 	end
 
 	return count