[geary] (9 commits) ...Merge branch 'wip/search-cleanup' into 'master'

[Michael Gratton <mjog src gnome org>]

Summary of changes:

  c54cb05... Fix critical when email body load is cancelled (*)
  f3ef345... Clean up client search term highlighting code (*)
  710f99d... Fix critical trying to load a conversation with 0 email (*)
  6be1293... Fix default value for ConversationOperation::allow_duplicat (*)
  6995947... Ensure conversation find entry focused when visble and shor (*)
  74ac2f6... Fix critical from loader timer when conversation email load (*)
  cc4bcdc... Clean up ImapDB.Account.search_async and related methods (*)
  beccdd4... Make ImapDB.Account.get_search_matches_async greedy strippi (*)
  82c1e64... Merge branch 'wip/search-cleanup' into 'master'

(*) This commit already existed in another branch; no separate mail sent