TinyMCE: add settings for the wptextpatterns plugin to add or override the default text patterns

[azaozz]

Continues from #33300.

Currently a WordPress plugin has to replace the whole wptextpattern editor plugin to add or change the text patterns. It would be better to let the patterns be changed by setting an editor option in the init array.

[azaozz]

36890.patch is almost identical to https://core.trac.wordpress.org/attachment/ticket/33300/33300.6.patch. It adds editor settings to add or override the default text patterns.

Example:

add_filter( 'tiny_mce_before_init', 'textpatterns_test' );
function textpatterns_test( $init ) {
	$init['wptextpattern_inline_patterns'] = '{
		strong: { start: "*", end: "*", format: "bold" },
		strong2: { start: "**", end: "**", format: "bold" },
		em: { start: "_", end: "_", format: "italic" }
	}';

	return $init;
}

[iseulde]

We added this in [39075]. :) The question now is if we should add methods to add and remove patterns more easily and/or if we should add any PHP filters just for this. At the moment you can only replace the settings.

[azaozz]

The code added in [39075] seems sufficient.