A few non-functional actions are suggested in the left and right panels of the GUI for Gaia units. These suggestions sometimes cause warnings and errors ([[ https://trac.wildfiregames.com/ticket/6853 | #6853 ]]) because Gaia is not a civilization and has no phases, technologies or specific units. This patch ensures that only (a) functional suggestions or (b) suggestions with informative value are provided. Examples of non-functional suggestions with informative value include stances (although the stance of a unit owned by Gaia cannot be changed, the panel informs what the current stance is) and formations (the panel reports the current formation of a set of units, if any). This patch also avoids displaying the left or right panels in certain cases where they were completely empty.