[ryonakano]

Fixes #1042
Closes #1023

Changes Summary

• Rebased Adapt to libcamel API changes in 3.57.1 #1023 on latest master
• Revived Bobby's followup commit mentioned at Adapt to libcamel API changes in 3.57.1 #1023 (comment) which was removed accidentally by rebase in the above PR
• Bump to libcamel 3.58 to fix the following build warning with 3.57.1:

      camel-1.2.vapi:1260.3-1260.33: warning: Creation method of abstract class cannot be public.
       1260 |             public MessageInfo.from_message (Camel.FolderSummary? summary, Camel.MimeMessage message);
            |             ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  

• Minor coding style improvements
  • Add comment after #endif
  • ConversationList: DRY
  • MoveOperation: Remove unnecessary #if

Checklists

I confirmed the following things on latest OS 8 Stable:

• Build succeeds with libcamel 3.52.3 (installed from apt)
• Build succeeds with libcamel 3.58.0 (installed from source code)
• Build succeeds with libcamel 3.62.1 (installed from source code)

For anyone who want to double-check, here are the steps I performed to build and install newer libcamel:

git clone https://gitlab.gnome.org/GNOME/evolution-data-server.git
cd evolution-data-server/
git checkout <3.58.0 or 3.62.1>
sudo apt build-dep libcamel1.2-dev 
cmake . -B builddir -DENABLE_INTROSPECTION=ON -DENABLE_VALA_BINDINGS=ON
make -C builddir/ -j$(nproc)
sudo make -C builddir/ install