Docs/panel refactor (#43569)

* new refactored panel docs

* fixed links

* removed xtra sharing link, added links to panel display option tasks

* fixed typo

* add aliases

* incorporate PM feedback

* intermediate commit to resolve merge conflict

* final changes to resolve merge conflicts

docs/sources/panels/specify-thresholds/delete-a-threshold.md

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+title = "Delete a threshold"
+weight = 30
+aliases = ["/docs/sources/panels/specify-thresholds/delete-a-threshold/"]
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+
+# Delete a threshold
+
+Delete a threshold when it is no longer relevant to your business operations. When you delete a threshold, the system removes the threshold from all visualizations that include the threshold.
+
+## Before you begin
+
+- [Add a threshold]({{< relref "./add-a-threshold.md" >}}).
+
+**To delete a threshold**:
+
+1. Navigate to the panel to which you want to add a threshold.
+1. Click the **Field** tab. (Or **Panel** tab for a graph panel.)
+1. Click the trash can icon next to the threshold you want to remove.
+1. Click **Save** to save the changes in the dashboard.