Hi,

I'd like to propose two additions to the GUI editor window:

1. Multi-Selection Editing
When multiple UI elements are selected, params that are unique per element (Name, Description, and Text) should be greyed out and non-editable. Params that are common across the selection should remain editable. Where selected elements have differing values for a shared param, display "–" as a placeholder to indicate the values are not uniform amongst the selected elements

This would significantly reduce friction when working on complex interfaces. Currently, when adjusting shared properties like scale or size requires selecting all elements, applying the change, deselecting, then selecting an individual element to verify if the param is correct, and repeating. Multi-selection editing would eliminate that process.

2. Configurable Insert Templates for UI Elements
Add a right-click context menu to entries in the standard UI element list. This menu would open a template configuration window where the default parameters for that element type can be set (width, height, text alignment, text size, and skin override).

Buttons are currently inserted with a default width of 0.270, height of 0.060, text alignment 0, text size 1, and an empty skin override. These defaults probably won't match the design of a custom button, meaning every newly placed button requires manual adjustment (although the skin could be configured in an application element). With configurable templates, a developer could define defaults that match their project's design once, rather than correcting values on each new element placed in different GUI's.

Thanks for considering these! Would love to hear feedback!