Dashboard code cleanup (#13996)

* Dashboard Cleanup
Remove static widgets table, list of available widgets should not be in the database.
Remove legacy ajax scripts
Cleanup and reorganize controllers

* reorganize code to put all dashboard things into it's controller
better url scheme while supporting the original

* lint clean ups

* properly formatted language file

* style fixes

* update schema

phpstan-baseline-deprecated.neon

@@ -3087,51 +3087,6 @@ parameters:
 			count: 1
 			path: includes/html/forms/update-alert-rule.inc.php
 
-		-
-			message:
-				"""
-					#^Call to deprecated function dbDelete\\(\\)\\:
-					Please use Eloquent instead; https\\://laravel\\.com/docs/eloquent\\#deleting\\-models$#
-				"""
-			count: 2
-			path: includes/html/forms/update-dashboard-config.inc.php
-
-		-
-			message:
-				"""
-					#^Call to deprecated function dbFetchCell\\(\\)\\:
-					Please use Eloquent instead; https\\://laravel\\.com/docs/eloquent$#
-				"""
-			count: 4
-			path: includes/html/forms/update-dashboard-config.inc.php
-
-		-
-			message:
-				"""
-					#^Call to deprecated function dbFetchRow\\(\\)\\:
-					Please use Eloquent instead; https\\://laravel\\.com/docs/eloquent$#
-				"""
-			count: 1
-			path: includes/html/forms/update-dashboard-config.inc.php
-
-		-
-			message:
-				"""
-					#^Call to deprecated function dbInsert\\(\\)\\:
-					Please use Eloquent instead; https\\://laravel\\.com/docs/eloquent\\#inserting\\-and\\-updating\\-models$#
-				"""
-			count: 1
-			path: includes/html/forms/update-dashboard-config.inc.php
-
-		-
-			message:
-				"""
-					#^Call to deprecated function dbUpdate\\(\\)\\:
-					Please use Eloquent instead; https\\://laravel\\.com/docs/eloquent\\#inserting\\-and\\-updating\\-models$#
-				"""
-			count: 1
-			path: includes/html/forms/update-dashboard-config.inc.php
-
 		-
 			message:
 				"""