Change wxSP_XXX flags values to avoid clashes with wxTE_XXX.

Change wxSP_XXX flags values to avoid clashes with wxTE_XXX.

wxSP_ARROW_KEYS conflicted with wxTE_AUTO_URL (which was probably not
important in practice as URLs don't appear in spin controls anyhow) and wxSPWR
conflicted with wxTE_NOHIDESEL (which could conceivably be a problem).

Change their values to reuse the bits of wxTE_CHARWRAP and wxTE_RICH2 neither
of which definitely makes sense for a spin control.

Closes #11461.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@65847 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775