[sldev] [PATCH] Allow XUI to specificy tooltips for combo box list entries

[Robin Cornelius]

Long over dew but patch at :-

http://jira.secondlife.com/browse/VWR-13177

This patch complements Aimee's VWR-8008 which had feedback from the UI
team to add tooltips to the combo box items (something that did not
actually work then)

is a patch that implements the feature of allowing the xui to specify
tool tips for the predefined entries in a combos list display. The
current tool tip display for a combo box is to display the same value
as in the list (for the list items NOT the combo box as a whole).
Which is not particularly helpful.

It allows an XUI <combo_item> element to have a tool_tip attribute and
then display this tool_tip for this specific item. It only shows this
tool tip if it is defined else it falls back to the existing/default
behavior for listboxes on combos.

Can some one give it a check before i commit to http-texture, thanks

Robin