editor: readable names in tool status and problem texts, waypoint reference buttons shorten to fit, x/y/z fields stack in a narrow inspector, whole-number outliner filter for tiles, z-buffered mesh import preview, gltf export of the selection only and of collision as a separate mesh

docs/manual/19-shortcuts.md

@@ -157,7 +157,7 @@ Every menu command with its shortcut and a short description.
 | Import texture… |  | Import PNG/JPG images as textures (colour reduction, blend class, packing) |
 | Export level WAD… |  | Build the level and save the game file (.wad) somewhere |
 | Export selection as OBJ… |  | Mesh, UVs, vertex colours, textures (PNG) and collision for Blender |
-| Export level as glTF… |  | The whole level with textures and vertex colours as .glb / .gltf (Blender, viewers) |
+| Export level as glTF… |  | The level (or the selection) with textures and vertex colours as .glb / .gltf (Blender, viewers) |
 | Close editor | **Ctrl+Q** | Close the editor |
 
 ### Edit menu