updates to the committers/subscribe tool

[Sam Ruby <ru...@intertwingly.net>]

https://whimsy.apache.org/committers/subscribe

For starters, this tool wouldn't work on whimsy-vm4.  It kept saying:

svnmucc: E160016: Can't commit to 
'https://svn.apache.org/repos/infra/infrastructure/trunk/subreq' because 
it is not a directory

Well, that is a directory, so all I can think of is that the version of 
svn on whimsy-vm4 (1.9.3) has a bug in it that the version of svn on 
whimsy-vm3 (1.8.8) does not.  Or that the syntax of svnmucc command 
changed in a non-backwards compatible fashion - but I could find no 
evidence of this.

So I change the single svnmucc command to three commands: svn checkout, 
svn add, and svn commit.  That sequence should work on both machines.

Other changes:

1) I checked the return code from the commit and produce a different 
alert text box depending on the result.

2) I moved the form so that it was always at the top.  Previously it 
would move to the bottom after a request was submitted.

3) I changed the list selection to be a live search.  For me, there 
seems to be a momentary pause when you first click on it, but after that 
it is much easier to use than a humongous list.

If people spot any problems, let me know.

- Sam Ruby