Entering `'` in a numeric input widget breaks the node

[radeusgd]

By accident I typed 8' in a number input widget and pressed enter.

https://github.com/enso-org/enso/assets/1436948/10c1862b-7264-49d5-9ccb-2d96e204fea9

Actual behaviour

operator3158.filter 'Grade' ( ( (Filter_Condition.Equal) ( 8 ( '))))

This led to the node becoming unparseable and display wrongly in the GUI.

Expected behaviour

The value should not be submitted, I probably should get some warning that ' is not a valid character in the numeric input.

Definitely the node should not become unparseable.

[farmaazon]

Refinement notes:

• We could fix unclosed text literals set in widgets as a part of "fixing AST" - TextLiteral printer could do that.
• Similarly, the unclosed ( should be automatically closed, because we cannot handle it by wrapping in ()
• Unclosed [ should be handled with current tree-repair approach, because it should be limited by encircling (). But it still gives bad UX, because setting widget value to 8[ will create an application, effectively replacing number widget with some tree.

So, the first two points should be done as a part of code widget. For this task, we should disallow number widget setting anything other than a number (at least until widget picker will be implemented - then we might be more flexible). Non-number values should be discarded.