Index management TOC and naming change (#3020)

* Index management TOC and naming change

Signed-off-by: ariamarble <armarble@amazon.com>

* fixing title in headers

Signed-off-by: ariamarble <armarble@amazon.com>

* made suggested changes

Signed-off-by: ariamarble <armarble@amazon.com>

* snapshot title change

Signed-off-by: ariamarble <armarble@amazon.com>

---------

Signed-off-by: ariamarble <armarble@amazon.com>

_dashboards/im-dashboards/datastream.md

@@ -1,11 +1,13 @@
 ---
 layout: default
-title: Data stream management
-parent: Index and snapshot management in OpenSearch Dashboards
+title: Data streams
+parent: Index management in Dashboards
 nav_order: 20
+redirect_from:
+  - /dashboards/admin-ui-index/datastream/
 ---
 
-# Data stream management
+# Data streams
 Introduced 2.6
 {: .label .label-purple }
 

_dashboards/im-dashboards/forcemerge.md

@@ -1,11 +1,13 @@
 ---
 layout: default
-title: Force merge management
-parent: Index and snapshot management in OpenSearch Dashboards
+title: Force merge
+parent: Index management in Dashboards
 nav_order: 30
+redirect_from:
+  - /dashboards/admin-ui-index/forcemerge/
 ---
 
-# Force merge management
+# Force merge
 Introduced 2.6
 {: .label .label-purple }
 

_dashboards/im-dashboards/index-management.md

@@ -1,11 +1,13 @@
 ---
 layout: default
-title: Index management
-parent: Index and snapshot management in OpenSearch Dashboards
+title: Indexes
+parent: Index management in Dashboards
 nav_order: 16
+redirect_from:
+  - /dashboards/admin-ui-index/index-management/
 ---
 
-# Index management
+# Indexes
 Introduced 2.5
 {: .label .label-purple }
 

_dashboards/im-dashboards/index.md

@@ -1,13 +1,13 @@
 ---
 layout: default
-title: Index and snapshot management in OpenSearch Dashboards
+title: Index management in Dashboards
 nav_order: 80
 has_children: true
 redirect_from:
   - /dashboards/admin-ui-index/
 ---
 
-# Index and snapshot management in OpenSearch Dashboards
+# Index management in Dashboards
 Introduced 2.5
 {: .label .label-purple }
 

_dashboards/im-dashboards/rollover.md

@@ -1,11 +1,13 @@
 ---
 layout: default
-title: Rollover management
-parent: Index and snapshot management in OpenSearch Dashboards
+title: Rollover
+parent: Index management in Dashboards
 nav_order: 40
+redirect_from:
+  - /dashboards/admin-ui-index/rollover/
 ---
 
-# Rollover management
+# Rollover
 Introduced 2.6
 {: .label .label-purple }
 

_dashboards/sm-dashboards.md

@@ -1,8 +1,9 @@
 ---
 layout: default
-title: Snapshot management
-parent: Index and snapshot management in OpenSearch Dashboards
-nav_order: 17
+title: Snapshot management in Dashboards
+nav_order: 90
+redirect_from:
+  - /dashboards/admin-ui-index/sm-dashboards/
 ---
 
 # Snapshot management

_tuning-your-cluster/availability-and-recovery/snapshots/index.md

@@ -1,7 +1,7 @@
 ---
 layout: default
 title: Snapshots
-nav_order: 30
+nav_order: 5
 has_children: true
 parent: Availability and Recovery
 redirect_from: