The ME_RunOfsFromCharOfs function finds the paragraph before finding the
run and offset within the run, so the function may as well be able to
return this paragraph to the caller.  Many callers to the function
instead find the paragraph from the run, which ends up unnecessarily
traversing a linked list of runs within the paragraph.

Whenever ME_InitContext is called, ME_DestroyContext should be used to
clean it up.  This way the context can be extended easily by modifying
those two functions.  Instead, these two places of code just released
the DC, without using ME_DestroyContext, so the created brush for the
margin was not deleted.

These calls to ME_WrapMarkedParagraphs never do anything, and don't make
sense to be called in these places. These places are for ME_MoveCaret,
and ME_ArrowHome, which both don't involve any text being modified, and
all (direct and indirect) calls to these functions are done after the
text has already been wrapped.

The value for nMaxChars can be found easier by using ME_GetTextLength.

msctf: When a Context is created connect to the ITextStoreACP if provided and create and advise our ITextStoreACPSink.

The address varies on older versions of Windows and isn't really important.

The combination of CF_BITMAP and TYMED_GLOBAL isn't accepted on newer
versions of Windows, so mark it as broken.