feat: added ability to save and load app window size and location

[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 added a configuration that saves the last size and position of the app and loads them during app startup. The change is purely on the UI side of the app, so I didnt run any tests.

Thank you.

fixes #95

[activescott]

Thanks! I’ll review this locally and investigate why ci isn’t running here in the next few days.

[activescott]

lgtm

[activescott]

:tada: This PR is included in version 1.11.0 :tada:

The release is available on:

• v1.11.0
• GitHub release

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