Make it more obvious what the 'add / remove map mode' menu does

[michael2402]

Discovered in a screen share with a new user:

Currently, below the map modes, there is a menu to enable / disable some modes in that menu bar.

The button looks like as if it was an overflow menu (a menu in which items that did not fit into the toolbar are placed). And the buttons look the same as the map modes. There is only a tooltip that says "Hide or show this toggle button", but who reads them?

We should make it more obvious what this menu does. We could add an eye-Icon or an settings-Icon somewhere (instead / next to the two arrows?). We might rename the items to read 'Show Select mode', 'Show Lasso mode'. We could make the icon size in the menu smaller (same icon size as in the main menu)