claimview: Re-attaching event listeners when creating qualifiers

(bug 48748)
Re-attaching the edit mode event listeners when creating the listview to contain
the qualifier snakviews. This ensures receiving the events triggered by the
qualifier snakviews when adding the first qualifier(s) to a claim.

Change-Id: Ibd2d9884814b565501684247e5b5f3c2d9f2f2c4
Merge "claimview: Re-attaching event listeners when creating qualifiers"