Move deprecated images to images-unused

Since I have been recreating the graphical assets in higher res, I came across several unused images. They are (that I have currently found):

activity-indicator-32x32.png
back-button.png	
dock-item-shadow-tile.png
empty-launcher.png
fade-arrow-down.png
loading-card-scrim.png
menu-selection-gradient-last.png
meta-move.png
overlay-banner-bg.png
popup-scrollfade-bottom.png
quick_launch_highlight.png
reorder-ripple.png
search-bottom-fade.png
search-icon-disabled.png
search-pill.png
search-pill-no-icon.png

I propose moving them to the images-unused folder.

Open-webOS-DCO-1.0-Signed-off-by: Duncan Stevenson
duncan@duncanstevenson.com