added ability to resize AboutBox form

[mega5800]

:+1::tada: First off, thanks for taking the time to contribute! :tada::+1:

Please fill out the following checklist:

• [ ] Added tests for any bug fixes that changed existing code
• [ ] Added tests for any new behavior
• [ ] All unit tests are passing (please make sure all tests are passing for your branch/PR at https://ci.appveyor.com/project/activescott/lessmsi/history )

If you need any help at all, feel free to submit the PR and @-mention activescott and I'll be happy to assist!

Hello @activescott

I took care of this ticket. I made the AboutBox form resizable, while having a minimum form size. Here's the final result:

In addition, I added the app icon to the About form as well. Please note that, AboutBox.Designer.cs file was regenerated since I made the changes via designer mode.

Thank you.

[activescott]

:tada: This PR is included in version 1.11.2 :tada:

The release is available on:

• v1.11.2
• GitHub release

Your semantic-release bot :package::rocket: