fix(usePointerSwipe): handle secondary clicks properly

[curtgrimes]

Description

Fix issue where a secondary click (the right button on a right-handed mouse) on an element using usePointerSwipe() is treated as if the primary button (left click on a right-handed mouse) has started a drag.

• Rename filterEvent() to eventIsAllowed() for better clarity
• Fix typo in docs and make punctuation consistent

Fixes #2338

Before

1. Right click on the button
2. Hit the Escape key to dismiss the context menu
3. Without clicking, move the mouse around over the button. The button behaves as if it is being dragged.

After

A right click does nothing other than open the context menu as usual.

What is the purpose of this pull request?

• Bug fix
• New Feature
• Documentation update
• Other

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