Updated the admin interface

Mostly updated the admin interface, also some small other items.

- Added more diagnostic information to (hopefully) decrease issue
  reporting, or at least solve them quicker.
- Added an option to generate a support string which can be used to
  copy/paste on the forum or during the creation of an issue. It will
try to hide the sensitive information automatically.
- Changed the `Created At` and `Last Active` info to be in a column and
  able to sort them in the users overview.
- Some small layout changes.
- Updated javascript and css files to the latest versions available.
- Decreased the png file sizes using `oxipng`
- Updated target='_blank' links to have rel='noreferrer' to prevent
  javascript window.opener modifications.

src/static/scripts/datatables.js

@@ -4,20 +4,20 @@
  *
  * To rebuild or modify this file with the latest versions of the included
  * software please visit:
- *   https://datatables.net/download/#bs4/dt-1.10.22
+ *   https://datatables.net/download/#bs4/dt-1.10.23
  *
  * Included libraries:
- *   DataTables 1.10.22
+ *   DataTables 1.10.23
  */
 
-/*! DataTables 1.10.22
+/*! DataTables 1.10.23
  * ©2008-2020 SpryMedia Ltd - datatables.net/license
  */
 
 /**
  * @summary     DataTables
  * @description Paginate, search and order HTML tables
- * @version     1.10.22
+ * @version     1.10.23
  * @file        jquery.dataTables.js
  * @author      SpryMedia Ltd
  * @contact     www.datatables.net
@@ -2775,7 +2775,7 @@
 				for ( var i=0, iLen=a.length-1 ; i<iLen ; i++ )
 				{
 					// Protect against prototype pollution
-					if (a[i] === '__proto__') {
+					if (a[i] === '__proto__' || a[i] === 'constructor') {
 						throw new Error('Cannot set prototype values');
 					}
 	
@@ -3157,7 +3157,7 @@
 				cells.push( nTd );
 	
 				// Need to create the HTML if new, or if a rendering function is defined
-				if ( create || ((!nTrIn || oCol.mRender || oCol.mData !== i) &&
+				if ( create || ((oCol.mRender || oCol.mData !== i) &&
 					 (!$.isPlainObject(oCol.mData) || oCol.mData._ !== i+'.display')
 				)) {
 					nTd.innerHTML = _fnGetCellData( oSettings, iRow, i, 'display' );
@@ -3189,10 +3189,6 @@
 	
 			_fnCallbackFire( oSettings, 'aoRowCreatedCallback', null, [nTr, rowData, iRow, cells] );
 		}
-	
-		// Remove once webkit bug 131819 and Chromium bug 365619 have been resolved
-		// and deployed
-		row.nTr.setAttribute( 'role', 'row' );
 	}
 	
 	
@@ -9546,7 +9542,7 @@
 	 *  @type string
 	 *  @default Version number
 	 */
-	DataTable.version = "1.10.22";
+	DataTable.version = "1.10.23";
 
 	/**
 	 * Private data store, containing all of the settings objects that are
@@ -13970,7 +13966,7 @@
 		 *
 		 *  @type string
 		 */
-		build:"bs4/dt-1.10.22",
+		build:"bs4/dt-1.10.23",
 	
 	
 		/**