Fix: Inhibit signature help when using multiple cursors to prevent obscuring the edits #14193
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When I use multiple cursors to edit inside a function call or a struct, the rendered
SignatureHelp
annoyingly hides my edits:capture-2025-08-09-11-27.mp4
This PR is suggesting a very simple fix to inhibit showing signature help when more than one selection is detected in the currently viewed document.
A more clever implementation could find if there's an actual overlap between the popup area and the selection locations - but I think a more significant refactoring will be needed.