Display copy button

Change-Id: Id4b370c52b21b8851f8838b600d310b7624eed56
Export given snapshot of artifact in xml

- Exported fields: file, int, float, string, text, date
- Todo: perms, (open)list (static/user/ugroup)
- Later: art_links

Change-Id: I975519705e58dbd21058c397edaea78b404375d9
Import an artifact and redirect to the edit view

Nothing in the hand of the end user. To test it, take an existing
artifact, its last changeset id and adapt this url to your data:
/plugins/tracker/?tracker=140&func=submit-copy-artifact&from_artifact_id=4624&from_changeset_id=13589

Please note that it copy the artifact 'as is'.

Change-Id: I46429f5f5a21aa986385335a8da35c7d8f85599d
Artifact copy form

Change-Id: I0bd723f4f60c2f473bfa27f9f469604bd3e378c4
Attachments titles and descriptions are listed in artifact copy form

Change-Id: Id5631abdc9f34ccb9af3262d60258fad97120274
Notify user that ArtLinks are not copied

Change-Id: I748780ea48de1eceb76bec7fb42772d87735489d
Refactoring: we already know the changeset

Change-Id: Ic46f884a09c33d7b8d1f350499eeb6f8ceea442e
Check that artifact belongs to requested tracker

Change-Id: I9d82ef0973e45b6696da80e2d609f6baa82cae46
Update the xml with submitted values

Change-Id: Ic2b25df5face74ca28c7632f888ab123b45cac98
Ensure that the user can read the requested artifact

Change-Id: I7143a989bbc263a9d469e34ac57ed336a5f45135
Text fields should not loose the initla format during the copy

 * Modify rnc and rng
 * Unit test
 * Import with and w/o change OK

Change-Id: I9fbfc01b3d6cfc3a836eed847ba2ed5651252374
Fix breadcrumbs add typo in language key

Change-Id: I816db8ad08e217df67d799729c6a775f08251a19
Merge "Text fields should not loose the initla format during the copy" into 6854_copy_artifact
Handle permissions on artifact field

Change-Id: I495e0b8b400f3db9395f7d66cf0db1b80870a853
Do not display the xref of the original artifact during the copy

Change-Id: If2d81025af47511b6056da5164932842fd5167eb
tasks #6917: bug with attachments

Change-Id: Iab3a3c922c27cc3207b0555c734714a137ef0abe
Merge "Do not display the xref of the original artifact during the copy" into 6854_copy_artifact
Handle (multi)lists

 * User, Usergroup, static
 * Exporter
 * Updater
 * Modify rnc and list strategy to deal with IDs

Change-Id: Ib06491501e289a5d683ef9cb7a8e1aaeb25aa263
tasks #6918: Send notifications after copy

Change-Id: Ia32da1a439342f0e2ce35acf044d84ac3d011a84
Merge branch '6854_copy_artifact' into stable

Conflicts:
	plugins/tracker/include/autoload.php

Change-Id: I5273d807260d416dda17fd7fca14dfe76c8ab374