[FIX] web_tour: fix position of the tips

When tips show something outside of the screen (bottom), the hover will flicker
 the tooltip.

Now the tooltip come on top of the tips, exactly like for the top.

https://drive.google.com/file/d/1p3IGEAy2QekrykIqOzTzyJhmzjxbk5N7/view

closes odoo/odoo#57572

X-original-commit: fd5b43336a11ade92b954c281e27a40d043df34f
Related: odoo/design-themes#356
Signed-off-by: Jérémy Kersten (jke) <jke@openerp.com>

addons/web_tour/static/src/js/tip.js

@@ -409,7 +409,7 @@ var Tip = Widget.extend({
             mbLeft -= (this.content_width - this.init_width);
         }
         if (!posVertical && overflow || this.info.position === "top") {
-            mbTop -= (this.content_height - this.init_height);
+            mbTop -= (this.viewPortState === 'down') ? this.init_height - 5 : (this.content_height - this.init_height);
         }