Desktop: Support triple-click inputs

[he1senbrg]

Before

triple-click-before.mp4

After

triple-click-after.mp4

This PR fixes triple-clicking text not selecting the entire paragraph on desktop.

Closes #3596

[timon-schelling]

Thanks for contributing, will test this later.

[timon-schelling]

change needed because of this frontend code.
We can have a discussion if that behavior is correct in the future.

	function onPotentialDoubleClick(e: MouseEvent) {
		...
		// Allow only repeated increments of double-clicks (not 1, 3, 5, etc.)
		if (e.detail % 2 == 1) return;