MDL-80748 core: flexible_table can be optionally responsive

.upgradenotes/MDL-80748-2024070105545553.yml

@@ -0,0 +1,11 @@
+issueNumber: MDL-80748
+notes:
+  core_table:
+    - message: >+
+        A new `$reponsive` property (defaulting to `true`) has been added to the
+        `core_table\flexible_table` class.
+
+        This property allows you to control whether the table is rendered as a
+        responsive table.
+
+      type: improved

lib/table/classes/flexible_table.php

@@ -101,6 +101,9 @@ class flexible_table {
     /** @var string Key of field returned by db query that is the id field of the user table or equivalent. */
     public $useridfield = 'id';
 
+    /** @var bool Whether to make the table to be scrolled horizontally with ease. Make table responsive across all viewports. */
+    public bool $responsive = true;
+
     /** @var array The sticky attribute of each table column. */
     protected $columnsticky = [];
 
@@ -1202,7 +1205,9 @@ class flexible_table {
 
             echo html_writer::end_tag('tbody');
             echo html_writer::end_tag('table');
-            echo html_writer::end_tag('div');
+            if ($this->responsive) {
+                echo html_writer::end_tag('div');
+            }
             $this->wrap_html_finish();
 
             // Paging bar.
@@ -1860,7 +1865,9 @@ class flexible_table {
         $this->wrap_html_start();
         // Start of main data table.
 
-        echo html_writer::start_tag('div', ['class' => 'no-overflow']);
+        if ($this->responsive) {
+            echo html_writer::start_tag('div', ['class' => 'no-overflow']);
+        }
         echo html_writer::start_tag('table', $this->attributes) . $this->render_caption();
     }