Fix default values for element properties not being totally visible in Designer

When editing a layout in Designer, if an element is selected in the WYSIWYG view, the properties of this element are show in the right panel. If a given property has a default value, Designer will populate the placeholder of the input of that property with that default value (the goal is to provide better context to the user).

The problem is that if the default value consists of a string that is too long for the input, the user can't see the entire value, rendering it basically useless.

The goal is to come up with a different approach to display this information to the user, regardless of how long it is.