default range selection initialization can be disabled

[stefanhoelzl]

fixes #4634

by default cell [0,0] is selected, when range selection is disabled. With this change this can be disabled, so that on table init no range is selected.

[azmy60]

Thanks for making a PR! Question - what happens if we press keyboard to navigate while the range does not exist?

[stefanhoelzl]

Thanks for making a PR! Question - what happens if we press keyboard to navigate while the range does not exist?

when the range does not exist, keyboard presses to navigate do nothing. You first need to select a range before you can navigate by keyboard.

[azmy60]

It's a great idea! But there are some changes needed before merge. I would prefer not to pass boolean flags to function like this if we can avoid that.