* In a previous update in 2021 many copyright ranges were truncated
accidentally, and some files have been copy-pasted with wrong years. These
dates have been fixed based on git history and original copyright messages.
Before, only MenuButtonPopup had an arrow. This makes it more obvious
as to whether the button will immediately do something when clicked or
if it will open a menu to choose a specific action.
This means the full rect won't be returned for SC_ToolButtonMenu if it
is used in a context where the default style doesn't expect the menu.
This is a separate commit to isolate future changes to this function.
* The filter icon was confusing since it had a 'refresh' badge instead of
'save/load/recent' type badge, and making the latter readable in a few pixels
is not feasible. Having the combo dropdown with saved filters is as intuitive
and works in-line.
* This gives us a consistent baseline to start from and ensures that any
things we don't customise and leave to defaults will still be the same
wherever we are running.
* The idea is tha this style won't change the palette and will just do
some minimal additions/changes to whatever the native style is, to
work around some rough spots.
baldurk