Fix open and switch command behaviour

- Open command uses Switch command- Switches to file if already opened; if not, opens the file.
- Improve switch command to search for the candidate entity in all panels, not just the selected panel, also focus on the panel when found.

Both improvements are a real time saver when using these commands with ipc.

src/df/gfx/df_gfx.c

@@ -1837,7 +1837,7 @@ df_window_update_and_render(Arena *arena, OS_EventList *events, DF_Window *ws, D
             df_cmd_params_mark_slot(&p, DF_CmdParamSlot_Window);
             df_cmd_params_mark_slot(&p, DF_CmdParamSlot_Panel);
             df_cmd_params_mark_slot(&p, DF_CmdParamSlot_Entity);
-            df_cmd_list_push(arena, cmds, &p, df_cmd_spec_from_core_cmd_kind(DF_CoreCmdKind_PendingEntity));
+            df_cmd_list_push(arena, cmds, &p, df_cmd_spec_from_core_cmd_kind(DF_CoreCmdKind_Switch));
           }
         }break;
         case DF_CoreCmdKind_Reload:
@@ -1870,14 +1870,18 @@ df_window_update_and_render(Arena *arena, OS_EventList *events, DF_Window *ws, D
         {
           B32 already_opened = 0;
           DF_Panel *panel = df_panel_from_handle(params.panel);
-          for(DF_View *v = panel->first_tab_view; !df_view_is_nil(v); v = v->next)
+          for(DF_Panel *p = ws->root_panel; !df_panel_is_nil(p); p = df_panel_rec_df_pre(p).next)
           {
-            DF_Entity *v_param_entity = df_entity_from_handle(v->entity);
-            if(v_param_entity == df_entity_from_handle(params.entity))
+            for(DF_View *v = p->first_tab_view; !df_view_is_nil(v); v = v->next)
             {
-              panel->selected_tab_view = df_handle_from_view(v);
-              already_opened = 1;
-              break;
+              DF_Entity *v_param_entity = df_entity_from_handle(v->entity);
+              if(v_param_entity == df_entity_from_handle(params.entity))
+              {
+                p->selected_tab_view = df_handle_from_view(v);
+                ws->focused_panel = p;
+                already_opened = 1;
+                break;
+              }
             }
           }
           if(already_opened == 0)