Fix wxOleConvertVariantFlags mentions in the documentation.

In some case wxConvertVariantToOleFlags was used instead.

Closes #15641.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_3_0_BRANCH@75127 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Ignore system colour change events in not yet initialized wxPropertyGrid.

Handling these events before the initialization was over could result in a
crash because m_categoryDefaultCell wasn't yet initialized when the window was
created. Fix this by ignoring these events during initialization.

Closes #15642.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_3_0_BRANCH@75128 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Reduce the extra space added to wxMSW wxStaticText to just 1 pixel.

This seems to be still enough to align the static text label and the text
control contents when they are positioned next to each other but reduces the
amount of "lost" space when they are positioned under each other.

Closes #15637.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_3_0_BRANCH@75129 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775