[WIP] Enable saving of multiple settings for tasks

[kscdnw]

On clicking the save button, all task windows would parse the task window to construct the specific MetaMorpheusTask object. This has been broken out into two methods. GetTaskFromGui returns the task, and save task calls GetTaskFromGui. This enables to new task parameter saving architecture to parse the task from the gui without closing the window.

[Alexander-Sol]

This PR is causing appveyor to hang for some reason. It stops in the middle of running the tests