clone: copy `.hg/bookmarks` during copy clone Now that the standard pull function includes bookmarks, we need to ensure that a copy clone also copies the bookmarks. This will let us drop the manual bookmark pulling done independently during a clone.

pull: move bookmark movements inside the `exchange.pull` There is no reason for bookmarks to get a special treatment. As a first step we move the code as is in the `exchange.pull` function. Integration with the rest of the flow will come later. Adding bookmarks to pull means that most clone paths are now pulling bookmarks through pull. We ensure that bookmark-update messages are properly suppressed in that case. In test-pull-http.t the 'requesting all changes' message disappear because we now get the authentication error on the `listkeys`command before such message is printed.

bookmarks: allow `updatefromremote` to be quiet This will be useful to use the function during clone (clone is not printing any bookmark data right now)

util: fix sorteddict.pop When using `.pop` on such object the list was not cleared of the popped key, leading to crash.

localrepo: pass arbitrary kwargs from `repo.pull` to `exchange.pull` We'll add bookmark-related arguments to `repo.pull` so we need to widen the signature of `repo.pull`. We should probably kill `repo.pull` now that `repo.push` is dead but this is outside the scope of this series.

pull: use `other.url()` as the source of a bookmark pull We want to move the bookmarks movement into `exchange.pull`, for this purpose we need to stop relying on variables from `command.pull`.

setup: set mode 644 or 755 on installed files

branches: reduce nesting in for loop

i18n: use datapath for i18n like for templates and help To avoid circular module dependencies we initialize i18n from util when datapath is found.

help: don't search randomly for help data - trust util.datapath The search was introduced in c904e76e3834 without a convincing explanation why it should be necessary ... except for consistency with templater handling. Now, just keep it simple.