Fixed a bug when, for versions of OutSystems UI higher than Version 2.15.0 and when being used inside a sidebar, the enter key was not triggering the selection of a record but was inserting a new line.

• Added hover class to the first element of the list to facilitate selection on Enter press
• Disabled list virtualization - this avoids visual bugs where the list would not render completely

Fixed an issue that was preventing the users to press enter before entering a 'mention' which is described here https://www.outsystems.com/forums/discussion/97309/mentions-enter-key-being-captured-by-mentions-reactive-component/