Dashboard widget update (#9515)

Implemented in Laravel
Doesn't use legacy PHP session
Several widgets have new features and settings, for example:

- Multiple ports in one graph
- Maps settings are configurable and override system settings but default to system settings
- Graylog stream and/or device selection
- Much improved graph widget selection
- Many more

DO NOT DELETE THIS TEXT

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resources/views/widgets/server-stats.blade.php

@@ -0,0 +1,50 @@
+<div class="col-sm-{{ $columns }}">
+    <div
+        id="cpu-{{ $id }}"
+        class="guage-{{ $id }}"
+        data-value="{{ $cpu }}"
+        data-max="100"
+        data-symbol="%"
+        data-title="CPU Usage"
+    ></div>
+</div>
+
+@foreach($mempools as $key => $mem)
+    <div class="col-sm-{{ $columns }}">
+        <div
+            id="mem-{{ $key }}-{{ $id }}"
+            class="guage-{{ $id }}"
+            data-value="{{ $mem['used'] }}"
+            data-max="{{ $mem['total'] }}"
+            data-label="Mbytes"
+            data-title="{{ $mem['mempool_descr'] }} Usage"
+        ></div>
+    </div>
+@endforeach
+
+@foreach($disks as $key => $disk)
+    <div class="col-sm-{{ $columns }}">
+        <div
+            id="disk-{{ $key }}-{{ $id }}"
+            class="guage-{{ $id }}"
+            data-value="{{ $disk['used'] }}"
+            data-max="{{ $disk['total'] }}"
+            data-label="Mbytes"
+            data-title="{{ $disk['storage_descr'] }} Usage"
+        ></div>
+    </div>
+@endforeach
+
+<script type='text/javascript'>
+    loadjs('js/raphael-min.js', function() {
+        loadjs('js/justgage.js', function() {
+            $('.guage-{{ $id }}').each(function() {
+                new JustGage({
+                    id: this.id,
+                    min: 0,
+                    valueFontSize: '2px'
+                });
+            });
+        });
+    });
+</script>