[Libreoffice-qa] bugzilla version dropdown menu cleanup

[Tommy]

I just did some cleanup in the dropdown version menu.
I put all the alpha, beta and rc from the 4.4.x and 5.0.x branches in 
hidden state.

as did in the past we hide those EOL branches releases from the list and 
leave only the final releases.

this will shorten the list for new bug reports since it's unlikely that 
new reports will be tested against very old alphas, betas and release 
caondidates.

If I remember correctly the time do to the cleanup is 6 months since EOL 
of a branch (which was yesterday for the 5.x line)

cheers, Tommy