scons: Fix imports
Merge branch 'master' of https://github.com/wesnoth/wesnoth-old
scons: find_include expand comprehension for debug
scons: find_include simplify API
Fix an assertion failure in the GUI2 placement.

If a vertical scrollbar is added to a widget its size is recalculated.
Unfortunalty the determination of the minimum width didn't take the
horizontal scrollbar in account. This lead to the container to be too
small for a widget with horizontal and vertical scrollbar causing the
placement to fail.

Fixes bug #22095, possibly #15615 and #21785.
Let listboxs update its contents when adding rows.

Before only remove reduced the size, now the adding also updates contents.
This should reduce the number of layout updates.
Avoid calling the change callback twice.

This caused issues with the gamestate inspector in combination with the
provious commit. Since the code only seems to be required for the
experimental MP lobby it has been disabled.
Remove redundant window invalidations.

The other commits in this branch make the calls to invalidate_layout()
redundant.
Merge branch 'gamestate_dialogue_improvements'

Improves the gamestate inspection dialogue. It fixes a long-standing
assertion issue and also reduces the amount of redundant work done.

Note the dialogue can still be improved further, but the currently
shown dialogue is /a/ valid way to show its contents.

The merge fixes bug #22095, possibly #15615 and #21785.
Strip trailing whitespace.
Use a variable as const ref instead of const.

Issue found by cppcheck.
add warning about memory leaks reported by cppcheck
change throw in destructor to an assert, to silence cppcheck
Merge pull request #184 from techtonik/master

Minor SCons enhancements
Merge branch 'master' of git://github.com/wesnoth/wesnoth
Honour the minimum size for a container.

Some containers require a minimum size when they draw on their own
canvas.

The change is part 1/2 of the fix for bug #22144.
Set the minimum size for a listbox cell.

The images drawn for a selected cell require a minimum size.

The change is part 2/2 of the fix for bug #22144.
Getter for translated names of the hex field directions.
Save the facing of the units to the scenario file.
Support for submenues which are associated with a hotkey action.