The vertical space in JOSM is really valuable and the positioning of the side buttons in the dialog panels at the bottom is rather space consuming. So I’ve put together this plugin that will allow the user to move the side buttons around for each dialog separately. The buttons can be placed at the left and right side and at the bottom of the dialog panel.
The default after installing the plugin is for the buttons to be at the right side of the dialog panel without displaying the text of the buttons.
The user can change the position in the context menu of the title bar of the dialog panel.
This is how it looks:
The source code can be found here: https://github.com/ds10git/josm-moveablesidebuttons-plugin