Disable the use of "override" keyword for MSVC < 11.

While the keyword is indeed supported since MSVC 8, it's only since MSVC 11
that using it doesn't generate C4481 compiler warning ("nonstandard extension
used"), so avoid using it with the earlier versions.

See #16100.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@76184 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Small refactoring in wxFileSystemWatcher MSW implementation.

Make wxIOCPService::GetStatus() smarter about its return value, it makes sense
to encapsulate the convention used to indicate the thread exit condition
inside wxIOCPService class itself instead of sharing it between it
wxIOCPThread itself.

It will also make it easier to detect more detailed error conditions in this
code.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@76185 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Fix handling deletion of watched directory in MSW wxFileSystemWatcher.

Don't log an incomprehensible error when the watched directory itself is
deleted, but generate wxFSW_EVENT_DELETE for it. This is consistent with the
behaviour under Unix and generally more useful.

Closes #13294.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@76186 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Fix wxFileSystemWatcher::RemoveAll() to actually work.

We need to call DoRemove() on all watcher objects to really remove them, just
removing our record of them was not enough and e.g. resulted in errors if we
tried to re-add a previously watched path again.

Closes #15531.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@76187 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Document what wxPrintQuality really is.

Mention that it can be either a predefined constant or a number expressing the
resolution.

See #14085.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@76188 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Fix toolbar repainting after deleting a tool in wxMSW.

The toolbar was in an inconsistent state when recalculating the sizes of the
separators used as placeholders for the controls and stretch spacers as the
tool was already deleted from the native toolbar but still present in wx
internal toolbar data and this resulted in discrepancies between the indices
in the native and wx toolbars.

Fix this by specially marking the already deleted but not yet removed tool and
ignoring it during the recalculations.

This makes the old, and only partially successful, attempt to work around this
bug in DoDeleteTool() unnecessary and so the code is actually simplified by
this change.

Closes #16095.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@76189 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775