VTable 'single' selection mode that disallows de-selection

[abulka]

Feature request: Single select mode should have a mode where you cannot deselect what is selected. Something should always be selected. This is the way most single select table views, menus and select components I've experienced operate.

In its current behaviour, you can deselect what is selected by clicking on it again, which leaves you in a situation where nothing is selected, which for my users, is bad. Something should always be selected.

<template>
>
  <div>
    <VTable
      ref="commitsTable"
      :data="globals.commitsData"
      selectionMode="single"   <----- need improved version of this mode
      selectedClass="selected-row"
      @stateChanged="stateChanged"
    >