DSK-357901: Opera tab in forms bug

dabblet.css

/* DSK-357901: Opera tab in forms bug */

.wrap1 {
	visibility: hidden;
	}
.wrap2 {
	visibility: visible;
	}

dabblet.html

<h1>Here tab works ok:</h1>
<input type="text"/>
<input type="text"/>
<div class="wrap1">
	<div class="wrap2">
		<h1>And here Opera bugs:</h1>
		<input type="text"/>
		<input type="text"/>
	</div>
</div>
<p>Place focus in any of the inputs and press tab multiple times in Opera.</p>

settings.json

{"view":"split","fontsize":"100","seethrough":"","prefixfree":"1","page":"css"}