bext: make 'single click to definition' an advanced setting
Created by: taras-yemets
Closes #30437
Makes click to the definition functionality opt-in from advanced settings.
By default, the Single click to go to definition checkbox in browser extension advanced settings is not checked. If the user wants to go to the definition, they should click the Go to definition button in the IntelliSense popup. If the user checks this checkbox, clicking on a code token will take them to the corresponding definition.