Fix scrollbar on ContentDB grid by adding an area label (#16042)

Co-authored-by: rubenwardy <rw@rubenwardy.com>

doc/lua_api.md

@@ -2842,6 +2842,9 @@ Version History
   * Add field_enter_after_edit[] (experimental)
 * Formspec version 8 (5.10.0)
   * scroll_container[]: content padding parameter
+* Formspec version 9 (5.12.0)
+  * Add allow_close[]
+  * label[]: Add "area label" variant
 
 Elements
 --------
@@ -3154,9 +3157,11 @@ Elements
 ### `textarea[<X>,<Y>;<W>,<H>;<name>;<label>;<default>]`
 
 * Same as fields above, but with multi-line input
+* Text is wrapped to fit within the given bounds.
 * If the text overflows, a vertical scrollbar is added.
 * If the name is empty, the textarea is read-only and
   the background is not shown, which corresponds to a multi-line label.
+  See also `label[<X>,<Y>;<W>,<H>;<label>]` for an alternative.
 
 ### `label[<X>,<Y>;<label>]`
 
@@ -3171,6 +3176,16 @@ Elements
   half a coordinate.  With the old system, newlines are spaced 2/5 of
   an inventory slot.
 
+### `label[<X>,<Y>;<W>,<H>;<label>]`
+
+* The "area label" formspec element displays the text set in `label`
+  at the specified position and size.
+* Text is wrapped to fit within the given bounds.
+* If the text overflows, it is currently simply truncated, but this behavior is
+  subject to change. There is no scrollbar.
+* See also `textarea` for an alternative.
+* Only available with the new coordinate system.
+
 ### `hypertext[<X>,<Y>;<W>,<H>;<name>;<text>]`
 * Displays a static formatted text with hyperlinks.
 * **Note**: This element is currently unstable and subject to change.