Bottom menu bar floating
Please following the below case scenario to replicate small #bug for Mobile view - see attachment.
Click on the attached picture under the post while keeping your Mobile phone vertically. When the picture is opened in the popup/modal turn your phone for the horizontal view and scroll up with a finger (try hard) so you can see an empty space under ZoomIn/ZoomOut controller and click that empty space then click X to close the popup/modal.
You should see the bottom menu not at the bottom of the screen but a little bit higher. Sometimes it happen in a vertical phone position too.
Ps. Bug topic is not available anymore under the post - only Annoucement topic is available for now for me here.
I would also size it up a little. Looks off compared to the upper one (especially if you save it as WebApp) :-) Also most screens can handle a upper and lower bar easily. I would rather make them the same size and make both a little smaller then the upper one.