Jan Ziak authored Jan 19, 2021 and Simon Steinbeiß committed Mar 03, 2021

Auto-adjust icon sizes independent of whether showing labels.

Additional changes made by this patch:

- Removal of hard-coded constants when drawing the circled
  number of windows in a group
- Repaint group button icon when its size changes
- Tasklist's default button size is increased from 25 to 32 pixels
  in order to avoid icons being cropped at the bottom and at the top
- Fix a memory leak

Changes in respect to version 1 of this patch (commit 9c9f09ce):

- Fix duplicate application of CSS opacity to the icon of a window group
  when all windows in the group are minimized
- Update tasklist icon size when panel is resized. The XfcePanelPluginClass
  struct doesn't have a separate 'icon_size_changed' method - a change
  in icon size is being signaled through the 'size_changed' method
  which is also invoked when the panel size changes.
- Add workarounds to ensure that the icon and the label are laid out
  properly if the icon has been resized
- Minor code cleanup: return G_SOURCE_REMOVE instead of FALSE

Test environments: FreeBSD, Gentoo, Xubuntu

Closes: #90
Obsoletes: !28
See also: #354