Triple-click text to select paragraph (Linux Desktop)

[DallinYauney]

On the web, triple-clicking text (either in a text box on the canvas, or in the UI, e.g. a layer name) will select the whole paragraph, but on desktop the third click just deselects the word.

Works as expected on latest in Firefox, doesn't work in the Appimage or Flatpak.

[he1senbrg]

Fixed in PR #3671