Allow to call wx_add_builtin_library for external targets.
and use it for the libwebp targets.

See wxWidgets#26428.

Closes wxWidgets#26456.

This was broken after recent changes.

See wxWidgets#26401.

Closes wxWidgets#26459.

So IDEs like Visual Studio show the correct character set.

Add an option to override the character set and use it in the win32 API tests.

See wxWidgets#26458.

Closes wxWidgets#26462.

The logic in wxTextCtrl::DoFreeze() for deleting leaked anonymous marks
when detaching the buffer kept raw pointers to GtkTextMark objects
without managing their reference count.

This worked for the specific internal mark targeted by this code, but
broke with other marks that may have become invalid in the meantime.
Specifically, GSpell uses such marks internally too, causing a
use-after-free crash.

Fixed by ref-counting the objects kept in m_anonymousMarkList.

Closes wxWidgets#26464.

Update links to Poedit in the docs, plus adjacent things things such as
the name or current path to xgettext.

Closes wxWidgets#26465.

This notably fixes user-visible problems when splitting wxAuiNotebook in
multiple panes.

See wxWidgets#26455.

Closes wxWidgets#26251.

Use wxBG_STYLE_PAINT, remove all the EVT_ERASE_BACKGROUND stuff,
and just draw the bitmap in the paint handler.

… under wxMSW

Ditto for wxDC::DeviceToLogical{Rel}() functions.

In RTL layout, these functions always return unmirrored coordinates under wxGTK3
and wxQt. This is now the case under wxMSW too for consistency and also to fix
double-mirroring problem when passing the transformed coordinates to GDI drawing
functions. See wxGrid::Render() for example.

Added in commit f5d326f (2025-10-19, wxMSW: Fix SetClippingRegion() after reverting commit 288b208)

wxDC::LogicalToDevice() now always returns unmirrored coordinates in RTL layout.

Also revert commit 3d40c2a (Fix wxDC::StretchBlit() for non-0
xsrc in RTL layout) which is no longer needed.

…in RTL

This constant is only used inside ApplyEffectiveScale()

No real changes.