Remove GUI object setting values z="0", size="0 0 100% 100%", hidden="false" in XML page specifications that are redundant with the default style values.
Remove question by brian in single_details_area.xml from rP11976 which is answered by "because the style set it".
Delete BuildNameText style, because it specifies ghost="true" in both style and sole object using the style.
Don't touch progressbar and structree styles, because there is more to clean.
Differential Revision: https://code.wildfiregames.com/D2292