Revert "Renamed Tracker option "Don't move files to Trash" (#9352)"

This reverts commit 45f77dcd7029914ccd99178dfb333eb68c7af9e5.
Removed Trash options from Tracker prefs.

As discussed [1][2], using a Trash is in the interest of the
vast majority of users. The setting is still present in the
Tracker settings file. SHIFT+DELETE will still bypass the
Trash.

[1]
http://www.freelists.org/post/haiku-commits/haiku-hrev45134-srckitstracker,4
[2] http://www.freelists.org/post/haiku/Removing-Trackers-Trash-options

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