Left-Align text in Unicode warning boxes (#18331)

Wrapped text is more readable when left-aligned.

Co-authored-by: Lauris BH <lauris@nix.lv>
Co-authored-by: zeripath <art27@cantab.net>

templates/repo/unicode_escape_prompt.tmpl

@@ -1,6 +1,6 @@
 {{if .EscapeStatus}}
 	{{if .EscapeStatus.BadBIDI}}
-		<div class="ui error message unicode-escape-prompt">
+		<div class="ui error message unicode-escape-prompt tl">
 			<span class="close icon hide-panel button" data-panel-closest=".message">{{svg "octicon-x" 16 "close inside"}}</span>
 			<div class="header">
 				{{$.root.i18n.Tr "repo.bidi_bad_header"}}
@@ -8,7 +8,7 @@
 			<p>{{$.root.i18n.Tr "repo.bidi_bad_description" | Str2html}}</p>
 		</div>
 	{{else if .EscapeStatus.HasBIDI}}
-		<div class="ui warning message unicode-escape-prompt">
+		<div class="ui warning message unicode-escape-prompt tl">
 			<span class="close icon hide-panel button" data-panel-closest=".message">{{svg "octicon-x" 16 "close inside"}}</span>
 			<div class="header">
 				{{$.root.i18n.Tr "repo.unicode_header"}}