There is no known way to reposition the home menu button (probably defined by hildon-desktop). It begins on the far left side of the screen, is 320 pixels wide and 60 pixels tall. The Diablo5 statusbar is only 50 pixels tall so you can tap anywhere in the 10 pixels below the statusbar to open the home menu. If you have space for 7 or fewer applets you can tap to the right of the statusbar to open the home menu. And if you set a left gap then you can tap there as well. The red area below shows the region that will activate the home menu. The red is not part of the image, right-click on the dark area to save the third image.
Save these five images to /usr/share/themes/Diablo5/images/
Save this file to /usr/share/themes/Diablo5/matchbox/theme.xml