The sticky_select_mode property is an enum where each item has a
different behavior, but currently the description is for a single one
of the items. It should be more general, especially because one of the
items is "Disabled."

A couple more problems:

• "Automatically" is not so helpful. Many things any program does are "automatic", it doesn't really help to say it.
• "Also" is bad grammar.
• Overly complex wording

This also adjusts the SHARED_VERTEX tooltip, because "irrespective"
should have "of" after, but it's also unecessarily complex.