[FIX] base: settings view match on label.text

Before this commit, search was broken because containsLike was searching on
the innerHtml. (3dd93ed1)

Settings use _wordHighlighter to change the background of the matching text
into the label, so the label was not only text, but html.

<label><span class="highlighter">Mul</span>ti-company</label>
    : looking for (mul)

After this commit, the match is based on the text content and not on the html.