doc: improve images
diff --git a/docs/admin/static/monitoring-alertmanger-list.png b/docs/admin/static/monitoring-alertmanger-list.png
index bd67873..3b6e08b 100644
--- a/docs/admin/static/monitoring-alertmanger-list.png
+++ b/docs/admin/static/monitoring-alertmanger-list.png
Binary files differ
diff --git a/docs/admin/static/monitoring-silences-menu.png b/docs/admin/static/monitoring-silences-menu.png
index 005fe69..a793bb1 100644
--- a/docs/admin/static/monitoring-silences-menu.png
+++ b/docs/admin/static/monitoring-silences-menu.png
Binary files differ