Fixa also a corner case which crashes Pcbnew: if the dialog is opened, and the board was changed (reloaded, cleared), pcbnew crashed because many pointers stored in dialog become invalid. Now the dialog is just closed.
File "rules" has instructional text as comments near top.
2) Convert all text files in repo to LF line ending form.
Any checkout done with "rules" in play will convert the working
tree to native line ending, while keeping repo as LF line ending.
Pcbnew: Drc dialog: fix a old very minor bug.
Added: single click on an item in marker list moves the board graphic cursor on the corresponding marker location on the board
Double clicking is not modified.