docs: Document the Date Picker in the Edit Task modal

docs/Editing/Create or edit Task.md

@@ -96,7 +96,21 @@ Note that relative dates will be always interpreted as being in the future, beca
 > - `Only future dates` was introduced in Tasks 1.15.0.
 > - Editing of [[Dates#Created date|created]], [[Dates#Done date|done]] and [[Dates#Cancelled date|cancelled]] dates was introduced in Tasks 5.5.0.
 
-### Date abbreviations
+#### Date picker
+
+> [!released]
+> Introduced in Tasks X.Y.Z.
+
+The modal provides a date picker, for easy selection of dates for your tasks.
+
+It uses a native date-picker on each platform, so the exact appearance and behaviour will vary.
+
+The screenshot below is from a Mac.
+
+![The date-picker allows easy mouse and keyboard adding and editing of dates](../images/modal-date-picker.png)
+<span class="caption">The date-picker allows easy mouse and keyboard adding and editing of dates</span>
+
+#### Date abbreviations
 
 > [!released]
 Introduced in Tasks 1.8.0.

docs/What is New/Changelog.md

@@ -12,6 +12,8 @@ _In recent [Tasks releases](https://github.com/obsidian-tasks-group/obsidian-tas
 
 ## 7.x releases
 
+- X.Y.Z:
+  - Add [[Create or edit Task#Date picker|date picker]] to the Edit Task modal.
 - 7.12.0:
   - Add [[Layout#Hide and Show Tree|display of nested tasks]] in search results, with `show tree`
 - 7.11.0: