with addons that are large and e.g. use git, it is very inconvenient to
have any files that is outside the addon directory. This patch makes it
possible to create an executable dir that is loaded as an addon.
- keep track of size and position for a number of dialogs
- make sure addons dialog opens at an appropriate size for the system
font size
- add optional argument to showText to restore geom on creation and save
on reject (other buttons, if used, need to be programmed to save
individually)
