Checked for general errors
Removed the option that a new or active block is selected automatically. This created a problem when MOVE was active
Fixed problem with Moving a line end point and the middle of line was selected. If Mouse.Single then only endpoints can be selected
Fiexed index problem when pipes were saved for undo. The block number got saved in place of the pipe number

Merge branch 'master' of https://github.com/benstof/express

Conflicts:
	DataUnt.pas
	Main.dfm
	Main.pas