Issue 15965 - Show password checkbox doesn't provide label or accessible name

Signed-off-by: Brent Nesbit <github@nesbit.me>

Author: nesb0t

core/templates/installation.php

@@ -49,7 +49,8 @@
 				value="<?php p($_['adminpass']); ?>"
 				autocomplete="off" autocapitalize="none" autocorrect="off" required>
 			<label for="adminpass" class="infield"><?php p($l->t( 'Password' )); ?></label>
-			<input type="checkbox" id="show" class="hidden-visually" name="show">
+			<input type="checkbox" id="show" class="hidden-visually" name="show"
+				   aria-label="Show password">
 			<label for="show"></label>
 		</p>
 	</fieldset>