feat(simulator): Update simulator to alert if the event name is bad

[finger563]

Description

Add alert to simulator so that if the user enters an event name that is invalid (but not empty), it alerts them that it is invalid.

Motivation and Context

Related to #163 we'd like to know when we make the event that the name is valid / invalid. similarly, if we open a model or edit a model, we'd like to be alerted if there are bad event names already present in the model.

How has this been tested?

Opening a good model, adding a bad even name, seeing the error. Also validated that the alert shows when opening a model if the model has a bad even name in it. Of course also tested with multiple bad event names (therefore multiple alerts).

Screenshots (if appropriate, e.g. schematic, board, console logs, lab pictures):

Event name marked in red (existing behavior): showing that it is invalid:

And alert when saving it:

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation Update
• Software change

Checklist:

• My change requires a change to the documentation.
• I have added / updated the documentation related to this change via either README or WIKI

Software

• I have added tests to cover my changes.
• All new and existing tests passed.
• My code follows the code style of this project.