Props editor hard to enter negative number

If you select all on a number prop and try to type in a negative value, it won't allow you.

You have to type the number in first, then add a negative sign.

Hm... that's because we are currently parsing the value to ensure it stays a number:

Lines 36 to 37 in 39a811d

    
           } else if (dataType === 'number') { 
        
             setEditableValue(parseFloat(target.value));

I suppose we could delay that conversion (string -> number) until/unless the changed value was actually applied:

Lines 62 to 63 in 39a811d

    
           if (key === 'Enter') { 
        
             overrideValueFn(path, editableValue);

	} else if (dataType === 'number') {
	setEditableValue(parseFloat(target.value));