Message 293392 - Python tracker

I'm mainly working on Linux, so these problem didn't affect me alot. I did some test on these issue:

#24801: right click works on 5.8.18 AS version.
#24570: calltips work
#25988: wrong issue number (?)
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#21603: concur with Ned, save as a file from foo to bar will have extension name, though it won't display on dialog when save as'ing.
#22897: work on 3.x
#28928: open file work well on 3.x with 5.8.18
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