Enabling Pointer Events
Whether the cursor is visible and whether your panels can be clicked/hovered is controlled by the css property
No pointer events. Even if the cursor is visible because of the style on another panel you won't be able to click on this panel, your clicks will go through it as if it's not there. If there are no panels below this then input will go to the game.
This is the default behaviour.
Force the cursor visible and active. The mouse input will never go to the game for this panel. If a panel with this style is visible then the cursor will be visible.
Inherit the event from its ancestors.
pointer-events: all when spawnmenu open key is pressed.
The suggested way would be to add a class to your root panel called something like
spawnmenuopen. Then you can have this style for your spawnmenu.
To show the pointer and still allow mouse input to the game, you can add
pointer-events: all to some panel with a width and height of 0. This way you still show the cursor, but no panel will steal your input. In most cases, you will also need to add
pointer-events: none to your rootpanel.