GSoC week 6 : Area Fill

Hi,

Last week, I completed the new preset listbox widget and sent in commits
for redesigning hatch and gradient tab.

1. Hatch tab - http://imgur.com/88IYimV
2. Gradient tab - http://imgur.com/3hKan1k


Bitmap tab is complete but requires minor UI tweaks -
https://gerrit.libreoffice.org/#/c/26402/

Color tab work is in progress but some workflows require discussion during
the weekly design meeting - https://gerrit.libreoffice.org/#/c/26868/

Goals for this week -
1. Complete redesigning work for all tabs.
2. Merge Bitmap tab.
3. Send in a preliminary commit to move all fillstyle tabs inside area tab.