docs: Link to preferences from shortcuts page

Also documented `[` and `]` shortcuts for switching tilesets and removed
some rather obsolete references to ancient Tiled versions.

docs/manual/keyboard-shortcuts.rst

@@ -1,7 +1,10 @@
 Keyboard Shortcuts
 ==================
 
-Try out these keyboard shortcuts to help save you time.
+.. note::
+
+   Most of the below shortcuts can be changed in the :ref:`Preferences
+   <keyboard-options>`.
 
 On Mac, replace ``Ctrl`` with the ``Command`` key.
 
@@ -25,11 +28,10 @@ General
 -  ``A`` - Invokes :doc:`automapping`
 -  ``Alt + C`` - Copy current position of mouse cursor to clipboard (in
    tile coordinates)
--  ``Ctrl + D`` - Duplicate selected objects (since Tiled 1.0, before it
-   was Delete)
+-  ``Ctrl + D`` - Duplicate selected objects
 -  ``Ctrl + Shift + D`` - Duplicate active layer
 -  ``F2`` - Rename (if applicable in context)
--  ``Tab`` - Hide docks and tool bars (since Tiled 1.0)
+-  ``Tab`` - Hide docks and tool bars
 -  ``Ctrl + PgUp`` - Select previous layer (above current layer)
 -  ``Ctrl + PgDown`` - Select next layer (below current layer)
 -  ``Ctrl + Shift + Up`` - Move current layer up
@@ -40,6 +42,8 @@ General
 -  ``Ctrl + Shift + Tab`` - Switch to right document
 -  ``Alt + Left`` - Switch to left document
 -  ``Alt + Right`` - Switch to right document
+-  ``]`` - Select next tileset
+-  ``[`` - Select previous tileset
 -  ``Ctrl + G`` - Toggle displaying of the tile grid
 -  ``Ctrl + W`` - Close current document
 -  ``Ctrl + Shift + W`` - Close all documents
@@ -97,7 +101,7 @@ When an object layer is selected
    -  ``End`` - Move selected objects to Bottom (with Manual object
       drawing order)
 
--  ``O`` - Activate :ref:`edit-polygons-tool` (was ``E`` until Tiled 1.0)
+-  ``O`` - Activate :ref:`edit-polygons-tool`
 -  ``R`` - Activate :ref:`insert-rectangle-tool`
 -  ``I`` - Activate :ref:`insert-point-tool`
 -  ``C`` - Activate :ref:`insert-ellipse-tool`
@@ -108,7 +112,7 @@ When an object layer is selected
 
 -  ``T`` - Activate :ref:`insert-tile-tool`
 -  ``V`` - Activate :ref:`insert-template-tool` (since Tiled 1.1)
--  ``E`` - Activate :ref:`insert-text-tool` (since Tiled 1.0)
+-  ``E`` - Activate :ref:`insert-text-tool`
 -  ``Ctrl + A`` - Select all objects in the current object layer
 -  ``Ctrl + Shift + A`` - Clear object selection
 

docs/manual/using-commands.rst

@@ -72,16 +72,16 @@ the following variables:
     the current maps full path.
 
 ``%mappath``
-    the full folder path in which the map is located. (since Tiled 0.18)
+    the full folder path in which the map is located.
 
 ``%objecttype``
-    the type of the currently selected object, if any. (since Tiled 0.12)
+    the type of the currently selected object, if any.
 
 ``%objectid``
-    the ID of the currently selected object, if any. (since Tiled 0.17)
+    the ID of the currently selected object, if any.
 
 ``%layername``
-    the name of the currently selected layer. (since Tiled 0.17)
+    the name of the currently selected layer.
 
 For the working directory field, you can additionally use the following
 variable:

docs/reference/tmx-map-format.rst

@@ -206,14 +206,12 @@ rendered.
 -  **format:** Used for embedded images, in combination with a ``data``
    child element. Valid values are file extensions like ``png``,
    ``gif``, ``jpg``, ``bmp``, etc.
--  *id:* Used by some versions of Tiled Java. Deprecated and unsupported
-   by Tiled Qt.
+-  *id:* Used by some versions of Tiled Java. Deprecated and unsupported.
 -  **source:** The reference to the tileset image file (Tiled supports most
    common image formats). Only used if the image is not embedded.
 -  **trans:** Defines a specific color that is treated as transparent
-   (example value: "#FF00FF" for magenta). Up until Tiled 0.12, this
-   value is written out without a ``#`` but this is planned to change.
-   (optional)
+   (example value: "#FF00FF" for magenta). Including the "#" is optional
+   and Tiled leaves it out for compatibility reasons. (optional)
 -  **width:** The image width in pixels (optional, used for tile index
    correction when the image changes)
 -  **height:** The image height in pixels (optional)