There's a small tweak that needs to be done for that last version (1.4.6 and up). I've explained it here on this post (scroll down to the SnowFlat section of that post) and also pushed a commit to the Q2A development.
But here's a short explanation:
SnowFlat theme
If you're using SnowFlat or created a custom theme based off of SnowFlat, you'll need to make a small tweak in your qa-theme.php file.
Here's the updated file: question2answer/pull/986/files/SnowFlat
Basically, you'll need to remove the qam-account-items-wrapper from inside the nav_user_search() function, and wrap it around nav_user_search() instead:
public function nav_user_search()
{
$this->output('<div class="qam-account-items-wrapper">');
...
$this->output('</div> <!-- END qam-account-items-wrapper -->');
}
public function nav_main_sub()
{
...
$this->output('<div class="qam-account-items-wrapper">');
$this->nav_user_search();
$this->output('</div>');
...
}
For other themes & theme developers
You can simply wrap your nav_user_search() like the example demonstrated above in the SnowFlat code snippet, add a CSS display:inline-block; property to the siblings (for example .qam-account-toggle , .qam-account-items in SnowFlat) and should be good to go.
PS:
Because you've customized the background-color of your Top-Navigation-Bar on your SnowFlat theme, you might also need to change the color of the bell to a darker color:
q2apro-on-site-notifications > css > osn-styles.min.css
.qam-account-items-wrapper #osnbox .osn-bell {
fill: #ffffff; /* remove this line */
fill: #000000; /* add this line */
}