Today, CreateTextServices() sometimes triggers an assertion failure in
select_style().

When ME_MakeEditor() calls ME_MakeFirstParagraph(), the editor
(ME_TextEditor) is not in a fully initialized state.  For example, the
font cache (pFontCache) is not fully initialized, which sometimes makes
select_style() believe that the cache slots are fully occupied.

Fix this by delaying the call to wrap_marked_paras_dc() until the editor
is fully initialized.

Also, delay the call to ITextHost::TxReleaseDC() until after
wrap_marked_paras_dc(), since we need the device context a bit longer.

Fixes: b70eb32c