✨ Adds current memory history widget

docs/widgets.md

@@ -47,6 +47,7 @@ Dashy has support for displaying dynamic content in the form of widgets. There a
   - [CPU Usage Per Core](#cpu-usage-per-core)
   - [CPU Usage History](#cpu-usage-history)
   - [Memory Usage Current](#current-memory-usage)
+  - [Memory Usage History](#memory-usage-history)
 - [Dynamic Widgets](#dynamic-widgets)
   - [Iframe Widget](#iframe-widget)
   - [HTML Embed Widget](#html-embedded-widget)
@@ -1257,6 +1258,30 @@ Real-time memory usage gauge, with more info visible on click
 
 ---
 
+### Memory Usage History
+
+Recent memory usage chart
+
+<p align="center"><img width="500" src="https://i.ibb.co/V3wSgW0/gl-mem-history.png" /></p>
+
+##### Options
+
+**Field** | **Type** | **Required** | **Description**
+--- | --- | --- | ---
+**`limit`** | `number` |  _Optional_ | Limit the number of results returned, rendering more data points will take longer to load. Defaults to `100`
+
+
+##### Example 
+
+```yaml
+- type: gl-mem-history
+  options:
+    hostname: http://localhost:61208
+    limit: 80
+```
+
+---
+
 ## Dynamic Widgets
 
 ### Iframe Widget