Fix querying the value of wxEnumProperty in wxPropertyGridEditor.

Doing this changed the internal state of the control and resulted in the
choice not being updated.

Fix this by using wxPG_PROPERTY_SPECIFIC.

Closes #15449.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_3_0_BRANCH@76551 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Fix recursive self-reference in wxRichTextAttr documentation.

Refer to wxTextAttr, not wxRichTextAttr itself.

Closes #16271.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_3_0_BRANCH@76552 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Fix wxSystemSettings::GetColour() returning transparent colors with GTK3, closes #16255

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_3_0_BRANCH@76564 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Fix wxPoint2DInt::operator*= and wxPoint2DInt::operator/= .

These operator functions are respectively adding and subtracting their arguments. Instead let the functions multiply and divide their arguments (like their wxPoint2DDouble counterparts were doing already).

See #10946.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_3_0_BRANCH@76566 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Cast arguments passed to wxPoint2DInt constructor.

Cast them to wxInt32 (instead of int) as that is the type of the wxPoint2DInt members m_x and m_y.

See #10946.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_3_0_BRANCH@76567 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Add 3 missing declarations for wxPoint2DInt non-member operator functions.

Three duplicate declarations were removed in r70493 instead of replacing them with the missing declarations.

Closes #10946.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_3_0_BRANCH@76568 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775