[issues] Small refactor of filtering

Author: LeaVerou

issues.html

@@ -74,8 +74,10 @@ <h2>
 		</fieldset>
 	</div>
 
-	<article property="issue" mv-multiple class="status-{status} issue-{openness} {if(filtered, 'filtered')}" id="issue-{id}">
-		<meta property="filtered" content="{(status and !get(statusFilter, status).show) or !get(openFilter, openness).show or (count(selectedTags) and !intersects(tag, selectedTags))}" />
+	<article property="issue" mv-multiple class="status-{status} issue-{openness} {if(or(filtered), 'filtered')}" id="issue-{id}">
+		<meta property="filtered" content="{status and !get(statusFilter, status).show}" />
+		<meta property="filtered" content="{!get(openFilter, openness).show}" />
+		<meta property="filtered" content="{count(selectedTags) and !intersects(tag, selectedTags)}" />
 
 		<h1>
 			<a href="#issue-{id}" property="id" mv-attribute="null" mv-default="{$previous.id + 1}">1</a>