Fix text visibility in visual modeling select dropdowns

[gowthamrajj]

Changes

UX improvements

• Data Modeling canvas selects keep dropdown text sized with zoom. Single- and multi-select menus in the visual editor stay inside the canvas transform so option text matches node chrome when you zoom in or out; truncated labels show the full value on hover.

[arunxdev]

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[ajayjayendran]

Looks good