Revert "Refactored userlist comparison code."

This reverts commit 67fa220f1a8c18f203a254861473814c07b04801.
Revert "Refactored game selection code."

This reverts commit bdfb13c82ba93cb01bce377d677ead2133ef7ba1.
Revert "Refactored more sorting code."

This reverts commit ba1bb8b877dab0ba5b6d5c275fa1fa3e4fc743dc.
Revert "Started to refactor plugin sorting code."

This reverts commit dc8f616bcb637f2fd4158aaf820b555a19eedf27.
Revert "Removed use of unnecessary current game reference."

This reverts commit 3a3361b9197bb926b879e87e630783d854faf163.
Revert "Fixed API compilation."

This reverts commit f270f07c86185984680999924d459215ca0fd980.
Revert "Renamed network.cpp to git.cpp"

This reverts commit db60a03e9e9088b21311c5be247d1b64ebaa2e35.
Revert "Fixed masterlist and userlist messages not shown."

This reverts commit 98073c355e9406ff3a2730da7dd25cffad71f965.
Revert "Fixed broken plugin loading."

This reverts commit 5aa4646ce6c2a140f78cbfb52445e510d09c262d.
Revert "Re-implemented plugin loading."

This reverts commit 2b90fc6c8b54af8bb556f43fc2be64f38e1cedde.
Revert "Sorting and editor init now use game lists."

This reverts commit 155a87321ad4e67258bf10c4bbb076dd611cffec.
Revert "Refactored masterlist updating code."

This reverts commit a5b8a1c89af206ed4721e365fb5e1390202c571e.
Updated for libloadorder 6.
Reversion-related fixes.

To the settings window handling changes in
a189a4670fa32a4ae2c2b8e6be1e66f2a24b6ad0, so that the fix for #199 can
still function without the code refactoring.