Unnecessary awaiting on event implementations

[Miha Markič]

For example:

private async void OpenDoorAsync()
        {
            await NavigationService.NavigateToPopupAsync<OpenDoorViewModel>(true);
        }

This code doesn't need await nor async. In fact it generates unnecessary code bloat behind the scenes. I'd do it like

private void OpenDoorAsync()
        {
            var ignore=NavigationService.NavigateToPopupAsync<OpenDoorViewModel>(true);
        }

[Eduard Tomàs]

/cc @jsuarezruiz

[Javier Suárez]

First of all, thank you for your contribution.
I have sent a PR with changes in some asynchronous commands to avoid making unnecessary use of async void.

[Eduard Tomàs]

PR #7 Merged! Thx to all!!!