simplified the project and project designer modules' layouts in preparation for better theming in v3.0+;
simplified the companies module layouts in preparation for better theming in v3.0+;
simplified the tasks module layouts in preparation for better theming in v3.0+;
simplified the admin modules layouts in preparation for better theming in v3.0+;
simplified the file module layouts in preparation for better theming in v3.0+;
simplified the calendar module layouts in preparation for better theming in v3.0+;
simplified the contacts module layouts in preparation for better theming in v3.0+;
simplified some addon module layouts in preparation for better theming in v3.0+;