scimoz: for Windows, tweak resize handling to ensure plugin is properly resized
* otherwise the plugin may not become visible, due to width and height of 0

(integrated from trunk branch change c13c5e5 by Todd Whiteman <toddw@activestate.com>)
scimoz: remove obsolete comments (no functional change)

(integrated from trunk branch change ca1de13 by Todd Whiteman <toddw@activestate.com>)