Tidy up comments

.github/workflows/windows.yml

@@ -41,7 +41,12 @@ jobs:
       fail-fast: false
       matrix:
         include: [
-          # Current installer NSIS with required plugins don't support x64 package
+          # In the past, we built only 32-bit packages (i686 architecture) on Windows because of problems getting 64-bit
+          # versions of NSIS plugins to work.  However, we now invoke NSIS without plugins, so the 64-bit build seems to
+          # be working.
+          #
+          # As of January 2024, some of the 32-bit MSYS2 packages/groups we were previously relying on previously are no
+          # longer available.  So now, we only build 64-bit packages (x86_64 architecture) on Windows.
           { msystem: MINGW64, arch: x86_64 },
           #{ msystem: MINGW32, arch: i686 }
         ]

CMakeLists.txt

@@ -183,7 +183,6 @@ if(UNIX AND NOT APPLE)
 
 elseif(WIN32)
    #============================================ Windows Install Directories ===========================================
-
    set(installSubDir_data "data")
    set(installSubDir_doc  "doc")
    set(installSubDir_bin  "bin")
@@ -392,9 +391,9 @@ message(STATUS "Doing ${CMAKE_BUILD_TYPE} build (DO_RELEASE_BUILD = ${DO_RELEASE
 # Note that if you change the minimum Qt version, you need to make corresponding changes to the .github/workflows/*.yml
 # files so that GitHub uses the appropriate version of Qt for the automated builds.
 #
-# For the moment, max version we can have here is 5.9.5, because that's what Ubuntu 18.04 topped out at
+# For the moment, max version we can have here is 5.12.8, because that's what Ubuntu 20.04 topped out at
 #
-set(QT5_MIN_VERSION 5.9.5)
+set(QT5_MIN_VERSION 5.12.8)
 
 # Set the AUTOMOC property on all targets.  This tells CMake to automatically handle the Qt Meta-Object Compiler (moc)
 # preprocessor (ie the thing that handles Qt's C++ extensions), without having to use commands such as QT4_WRAP_CPP(),

bt

@@ -52,7 +52,8 @@
 # *
 # * WINDOWS USERS PLEASE NOTE that, on Windows, we assume you are running in the MSYS2 MINGW32 environment.  This is one
 # * of, typically, four different environments available to you after installing MSYS2.  You must run this script from
-# * the "MSYS2 MinGW 32-bit" shell, and not one of the other ones.
+# * the "MSYS2 MinGW 64-bit" shell, and not one of the other ones.  (As of 2024-01, we no longer support 32-bit builds
+# * because some libraries we rely on are no longer available as 32-bit MSYS2 packages.)
 # *
 # * Additionally on Windows, there are also a couple of extra things you need to do before running this bt script:
 # *
@@ -1737,6 +1738,13 @@ def doPackage():
          #
          # For the moment, we're sticking with NSIS, which is the devil we know, aka what we've historically used.
          #
+         # In the past, we built only 32-bit packages (i686 architecture) on Windows because of problems getting 64-bit
+         # versions of NSIS plugins to work.  However, we now invoke NSIS without plugins, so the 64-bit build seems to
+         # be working.
+         #
+         # As of January 2024, some of the 32-bit MSYS2 packages/groups we were previously relying on previously are no
+         # longer available.  So now, we only build 64-bit packages (x86_64 architecture) on Windows.
+         #
 
          #
          # As mentioned above, not all information about what Meson does is readily exportable.   In particular, I can