Hopeful contributions

[martinnj]

code related to:

• CKAN should not remove ship folders if empty on uninstall #1191
• Implement ckan.exe remove --all #977
• (De)select all button #1148

Note: There is an oddity which occurs when you have a mod installed that have dependencies, and you click the new "deselect all". If you then reselect a mod that have dependencies, it does not install the mods since dependencies are not met.
I've been unable to find where dependencies are resolved, I think that logically it should be done in MarkModForInstall, however I do not see the current resolution logic there.

If you can point me where to implement it I will fix this myself.

[pjf]

In the core, relationship resolution happens in the RelationshipResolver class, although I'm not personally familiar with how the GUI reaches that point, which is what I think you're after.

I'm working through as many PRs as I can today, so hopefully that includes this one, too (if nobody else gets to it first, which would be awesome).

Also while it's fine to pop all three changes into one PR, we love it even more when they come in separate PRs. That makes reviewing much easier, gives us a nicer changelog (each merge into master usually results in a release notes entry), and means issues with one change doesn't block any others.

Thank you so much again for this. And if you haven't found us on #ckan on irc.esper.net, you should. :)

[martinnj]

I was on the IRC a couple of hours last night (EU time) was a quiet place at the time.

I'll close this PR, do some voodoo to my fork and create a bunch of new PRs instead.