Fix event id intersections when toggling some columns via popup.

Also increases maximum show/hide column count to 50.
Fixes https://gitlab.com/kicad/code/kicad/-/issues/9765

eeschema/fields_grid_table.cpp

@@ -41,7 +41,7 @@
 
 enum
 {
-    MYID_SELECT_FOOTPRINT = 991,         // must be within GRID_TRICKS' enum range
+    MYID_SELECT_FOOTPRINT = GRIDTRICKS_FIRST_SHOWHIDE - 2, // must be within GRID_TRICKS' enum range
     MYID_SHOW_DATASHEET
 };