look for backtrace() in -lexecinfo, fixes #14942

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@73333 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
remove ancient SetModal(), it was deprecated long ago and is not present in wxMSW or wxOSX

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@73334 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
use gtk_file_chooser_set_show_hidden() now that GTK 2.6 is required

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@73337 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
gtk_assert_dialog_set_message is only defined if wxUSE_STACKWALKER is set

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@73338 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
gtk_assert_dialog_set_message() was unintentionally excluded in r73163

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@73339 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Re-lay out the grid sample window after auto-sizing the grid.

Changing the size of the grid without updating the sizer resulted in
overlapping windows and a mess on the display.

Closes #14948.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@73343 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Merge branch 'master' of git://github.com/wxWidgets/wxWidgets