That dosnt work...it moved from the xy coordinates but wouldnt budge with margins...no margin setting tried(and I tried a lot)would alter the position of that search icon(or the searchbar itself).Redesigning or resizing the bottom bar is unacceptable.Power buttons will not move at all away from the searchbar.
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I had the same problem with the search box. Seems that a minimum size (height) of the bottom bar is definitely needed for a correct placement of it´s content otherwise they are forced downwards (text margins don´t do anything here...).
And for the annoying hunt for "which color is used here again" I made some simple skin where I used totally ugly but characteristic colors for each system color to find out which is which. That helped a lot.
Maybe we should publish a list of colors used in certain sections (or better some screenshot) (I made one for me for Vista Explorer)