Add local version of escapeHTML

[kesselb]

Fix #23177

Code taken from #22647

server/apps/files_external/js/settings.js

Line 144 in 59b6374

var $result = $('<span><div class="avatardiv"/><span>'+escapeHTML(element.displayname)+'</span></span>');

server/apps/files_external/js/settings.js

Lines 156 to 160 in 59b6374

	if (element.type === 'group') {
	return '<span title="'+escapeHTML(element.name)+'" class="group">'+escapeHTML(element.displayname+' '+t('files_external', '(group)'))+'</span>';
	} else {
	return '<span title="'+escapeHTML(element.name)+'" class="user">'+escapeHTML(element.displayname)+'</span>';
	}

[faily-bot]

🤖 beep boop beep 🤖

Here are the logs for the failed build:

Status of 33817: failure

mysql8.0-php7.4

• I'm a little sad 🤖 and was not able to find the logs for this failed job - please improve me at https://github.com/MorrisJobke/drone-logs to provide this to you

[rullzer]

Ideally we mov e all this over to webpack. then we can just import it.... but for now sure I guess.

[szaimen]

Will this get backported to NC20?

[nickvergessen]

/backport to stable20