-Finish showProblem() in components/problemSummary.js (send event with infos, and pass message to game component)
-Add new mode in game component: "problem", in which we show description + hidden solution (reveal on click)
+1) abort / draw / resign: pass to opponent if online, store in game if corr
+2) styling: connection indicator, names, put movesList + chat in better positions
+3) complete translations, stylesheets, variants rules ...
+--> publish
+Later: implement analyze from position, multiple connections per SID ("double" games, simul games...)
+ (to allow problems links in forum)