Dynamic UI components (#1162)

Hide/Show UI components based on the IAM policy of the current user

- Buckets lists: hide/show manage button
- Bucket admin page: left menu items enable/disable
- Bucket admin page: bucket configuration buttons are enabled/disabled
- Bucket admin page: hide/show create buttons
- Bucket admin page: enable/disable requests to backend service
- Object browser: hide/show bucket buttons for upload, delete, etc
- Object browser: hide/show bucket configuration button
- Object details: hide/show object buttons, ie: delete
- Object details: hide/show object attributes, ie: legal hold,
  retention, tags, etc

Signed-off-by: Lenin Alevski <alevsk.8772@gmail.com>

Co-authored-by: Daniel Valdivia <18384552+dvaldivia@users.noreply.github.com>

models/bucket.go

@@ -40,12 +40,18 @@ type Bucket struct {
 	// access
 	Access *BucketAccess `json:"access,omitempty"`
 
+	// allowed actions
+	AllowedActions []string `json:"allowedActions"`
+
 	// creation date
 	CreationDate string `json:"creation_date,omitempty"`
 
 	// details
 	Details *BucketDetails `json:"details,omitempty"`
 
+	// manage
+	Manage bool `json:"manage,omitempty"`
+
 	// name
 	// Required: true
 	// Min Length: 3