feat(editor): the tutorial lesson of laying track lists Ctrl+wheel for the radius and Shift+wheel for the shape, the lesson of fixing tells the gizmo can be turned off so the track isn't moved or stretched by chance, and the clips only draw each frame over the last one, so every GIF reader shows them alike

application/editormode.cpp

@@ -4767,6 +4767,8 @@ void editor_mode::render_first_steps()
 	      {"L", "The lay tool"},
 	      {"LMB", "A click on the ground: the first point; the next click: a straight up to it"},
 	      {"LMB", "Each next click lays a piece on from the end of the last one"},
+	      {"Ctrl + wheel", "The radius of the curve, while laying on from an end"},
+	      {"Shift + wheel", "The shape: arc then straight, straight then arc, arc, straight"},
 	      {"Backspace", "Takes the last piece back"},
 	      {"Esc", "Ends laying"}},
 	     {{first_step::tracks, "Open the Tracks field of work"}, {first_step::lay, "Turn the lay tool on"}, {first_step::laid, "Lay a track"}},
@@ -4802,6 +4804,7 @@ void editor_mode::render_first_steps()
 	      {"LMB", "Click a track: it is selected, with its points"},
 	      {"LMB + move", "Drag a point: the end or the curve follows"},
 	      {"Q W E", "Move, turn or scale with the gizmo"},
+	      {"Gizmo", "Tool options, Gizmo, Enabled unticked: the track can't be moved, turned or stretched by chance; its points still drag"},
 	      {"RMB", "A click on a track: what can be done with it"},
 	      {"Del", "Deletes the selected"},
 	      {"Ctrl + Z", "Takes the last change back; Ctrl+Y brings it back again"}},

lang/editor_pl.po

@@ -6411,3 +6411,6 @@ msgstr "zaczyna od końca %s"
 msgid "moved %.3f m"
 msgstr "przesunięto o %.3f m"
 
+msgid "Tool options, Gizmo, Enabled unticked: the track can't be moved, turned or stretched by chance; its points still drag"
+msgstr "Opcje narzędzia, Gizmo, bez Włączone: toru nie przesuniesz, nie obrócisz ani nie rozciągniesz przypadkiem; punkty dalej się ciągną"
+