The version is already shown in the title bar of the feature selection dialog
and in the text of the welcome dialog. It's unusual for Windows programs to repeat
the version in the root feature.
Without this, Mercurial is registered under the installed programs
on Windows as just 'Mercurial', which is unusual for a program to do
on Windows.
Including the version in the registered product name registers the
software in the Windows control panel of installed programs as, for
example, 'Mercurial 1.5' (for 1.5), or as
'Mercurial 1.5.1032' for a stable 1.5+32-d9a6645d6d9b
'Mercurial 1.5.5080' for a unstable 1.5+80-1119076dd3e8
when using http://bitbucket.org/tortoisehg/thg-winbuild to create
daily builds.
Furthermore, the install UI texts in the built installer database (MSI
file) are more clear on what the user is about to install, as, for example,
the text in the initial installer dialog now reads
"The Setup Wizard will install Mercurial 1.5 on your computer"
instead of just
"The Setup Wizard will install Mercurial on your computer"
This is simply a convenience to the user, they can click next until the
installer goes away. Optimally, the checkbox would be hidden or removed,
but that requires rewriting the UI.
Moving the file from the misc directory of the thg-winbuild repo, which
uses mercurial's contrib/wix.
This file is displayed by the install UI sequence, so it belongs to the
WiX sources quite closely.
It happens to be installed by the msi installer, too.
