Handle folder operation errors

app/src/main/java/eu/faircode/email/Core.java

@@ -1756,17 +1756,21 @@ class Core {
         List<EntityFolder> folders = db.folder().getFolders(account.id, false, false);
         for (EntityFolder folder : folders)
             if (folder.tbc != null) {
+                try {
                     Log.i(folder.name + " creating");
                     Folder ifolder = istore.getFolder(folder.name);
                     if (!ifolder.exists()) {
                         ifolder.create(Folder.HOLDS_MESSAGES);
                         ifolder.setSubscribed(true);
                     }
-                db.folder().resetFolderTbc(folder.id);
                     local.put(folder.name, folder);
+                } finally {
+                    db.folder().resetFolderTbc(folder.id);
                     sync_folders = true;
+                }
 
             } else if (folder.rename != null) {
+                try {
                     Log.i(folder.name + " rename into " + folder.rename);
                     Folder ifolder = istore.getFolder(folder.name);
                     if (ifolder.exists()) {
@@ -1790,18 +1794,23 @@ class Core {
                         db.folder().renameFolder(folder.account, folder.name, folder.rename);
                         folder.name = folder.rename;
                     }
+                } finally {
                     db.folder().resetFolderRename(folder.id);
                     sync_folders = true;
+                }
 
             } else if (folder.tbd != null && folder.tbd) {
+                try {
                     Log.i(folder.name + " deleting");
                     Folder ifolder = istore.getFolder(folder.name);
                     if (ifolder.exists()) {
                         ifolder.setSubscribed(false);
                         ifolder.delete(false);
                     }
+                } finally {
                     db.folder().deleteFolder(folder.id);
                     sync_folders = true;
+                }
 
             } else {
                 if (EntityFolder.DRAFTS.equals(folder.type))