make files read only at the end of checkin command. This will allow u…

…nreal to show pop up window asking if we want to checkout files

I am deeply sorry that I didn't even have a look at your work, I have been very busy the last months :(

Hello, I have been thinking about this recently:I think we need to have this only as an option because it's so disruptive. Then, there is also an issue if someone wants to disable this (files left read-only) so perhaps do we need to force them back to writable.

I have a newborn kid at home, so not a lot of energy to tackle such changes in the short term