ui: remove Escape characters for TextBoxLabel

The reason that we use:
SafeHtmlUtils.htmlEscape(renderedText);
is to prevent javascript code injection such as <script> etc.
Its looks like the control is already safe rendering (tested with
<script>, <b> and <h1>).
without removing this line its render <>,. as theyer escaped value.

Change-Id: I2e303decb9395fcf193e874b4ae55ab076ec0bba
Bug-Url: https://bugzilla.redhat.com/1113499
Signed-off-by: Shahar Havivi <shaharh@redhat.com>