Closes #2885: Allow multiple DesktopModules in a single package

[kestasjk]

Summary

A very simple change to the DesktopModule installation logic allowing multiple DesktopModules in a single Package.

[dnfclas]

All CLA requirements met.

[kestasjk]

Note that the conflict here is trivial; this does not actually conflict with anything in the development branch.

[valadas]

@kestasjk the conflict can be resolved by merging the latest changes from the development branch, as is, this PR would undo the recent changes for supporting version numbers with 4 blocks like 01.01.01.01

[kestasjk]

Understood; I will close this and submit one with the change against the development branch.

[valadas]

That works.

Ideally for easier patching of PRs if you get requested some minor change:

1. In your local clone, switch to the target branch

git checkout development

2. If not done already, setup the upstream repository

git remote add upstream https://github.com/dnnsoftware/Dnn.Platform

3. Ensure your target branch is up to date

git fetch upstream
git pull upstream development

4. Create a branch specific to the subject you are working on

git checkout -b issue-2886

5. Do your thing as usual, commit, push submit PR, etc.

Then if changes are needed you can just return to that subject specific branch and add more commits and push, that will update the PR in place without any other steps.