[Rd] Change windows installer default to only install 64 bit R

[Jim Hester]

The R Installer by default installs both the 32 and 64 bit versions of
R. This can cause user confusion as they have multiple versions of R
installed and are then unsure which to use, or mistakenly open the
wrong version.

We can remove much of this ambiguity by changing the default choice in
the installer to only install the 64 bit version in the installer. If
users do need the 32 bit version it is still simple for them to
install it by checking the appropriate box during installation.

The following diff (also attached) simply reorders the options in the
install dialog to make 64 bit only installs the default. If users do
not have 64 bit support in their OS the options fallback to 32 bit
install by default, the same as they do currently in that situation.

There also seemed to be a bug in that 32 bit installs did not include
the message translations, which is also fixed.

Thanks for your consideration,

Jim

Index: src/gnuwin32/installer/types3264.iss
===================================================================
--- src/gnuwin32/installer/types3264.iss (revision 75569)
+++ src/gnuwin32/installer/types3264.iss (working copy)
@@ -1,8 +1,8 @@

 [Types]
+Name: "user64"; Description: "64-bit {cm:user}"; Check: Is64BitInstallMode
 Name: "user"; Description: {cm:user}; Check: Is64BitInstallMode
 Name: "user32"; Description: "32-bit {cm:user}"
-Name: "user64"; Description: "64-bit {cm:user}"; Check: Is64BitInstallMode
 Name: "custom"; Description: {cm:custom}; Flags: iscustom

 [Components]
@@ -9,4 +9,4 @@
 Name: "main"; Description: "Core Files"; Types: user user32 user64  custom
 Name: "i386"; Description: "32-bit Files"; Types: user user32 custom
 Name: "x64"; Description: "64-bit Files"; Types: user user64 custom
-Name: "translations"; Description: "Message translations"; Types:
user user64 custom
+Name: "translations"; Description: "Message translations"; Types:
user user32 user64 custom