Moved Detect 3D section to more intuitive location

Docs » Project workflow » Assets workflow » Importing images:
https://docs.godotengine.org/en/3.1/getting_started/workflow/assets/importing_images.html#detect-3d

Moved Detect 3D sub-section at the end of Importing textures main-section as the Detect 3d property is in the very top section of the Import tab (as shown in the Import options picture above).

getting_started/workflow/assets/importing_images.rst

@@ -24,6 +24,12 @@ Import options are vast:
 
 .. image:: img/image_import1.png
 
+Detect 3D
+~~~~~~~~~
+
+This option makes Godot be aware of when a texture (which is imported for 2D as default) is used in 3D. If this happens, setting are changed so the texture flags
+are friendlier to 3D (mipmaps, filter and repeat become enabled and compression is changed to VRAM). Texture is also reimported automatically.
+
 Compression
 -----------
 
@@ -153,9 +159,3 @@ Invert Color
 ~~~~~~~~~~~~
 
 Reverses the image's color. This is useful, for example, to convert a height map generated by external programs to depth map to use with :ref:`doc_spatial_material`.
-
-Detect 3D
----------
-
-This option makes Godot be aware of when a texture (which is imported for 2D as default) is used in 3D. If this happens, setting are changed so the texture flags
-are friendlier to 3D (mipmaps, filter and repeat become enabled and compression is changed to VRAM). Texture is also reimported automatically.