added edit menu arrows and fixed/added missing metrics

Themes/_fallback/Graphics/EditMenu left.lua

@@ -0,0 +1,8 @@
+return Def.ActorFrame {
+	Def.Quad {
+		InitCommand=cmd(zoomto,10,10;y,-5;skewx,-1);
+	};
+	Def.Quad {
+		InitCommand=cmd(zoomto,10,10;y,5;skewx,1);
+	};
+}

Themes/_fallback/Graphics/EditMenu right.lua

@@ -0,0 +1,8 @@
+return Def.ActorFrame {
+	Def.Quad {
+		InitCommand=cmd(zoomto,10,10;y,-5;skewx,1);
+	};
+	Def.Quad {
+		InitCommand=cmd(zoomto,10,10;y,5;skewx,-1);
+	};
+}

Themes/_fallback/metrics.ini

@@ -3171,6 +3171,7 @@ RemoveCardP2OffCommand=
 [ScreenPrompt]
 Class="ScreenPrompt"
 Fallback="ScreenWithMenuElementsBlank"
+PrevScreen="ScreenEdit"
 TimerSeconds=-1
 
 QuestionX=SCREEN_CENTER_X