[Feature] Added slideshow to gallery in wall display mode (#1224)

graphql/documents/data/config.graphql

@@ -2,7 +2,7 @@ fragment ConfigGeneralData on ConfigGeneralResult {
   stashes {
     path
     excludeVideo
-    excludeImage 
+    excludeImage
   }
   databasePath
   generatedPath
@@ -52,6 +52,7 @@ fragment ConfigInterfaceData on ConfigInterfaceResult {
   css
   cssEnabled
   language
+  slideshowDelay
 }
 
 fragment ConfigData on ConfigResult {

graphql/schema/types/config.graphql

@@ -188,6 +188,8 @@ input ConfigInterfaceInput {
   cssEnabled: Boolean
   """Interface language"""
   language: String
+  """Slideshow Delay"""
+  slideshowDelay: Int
 }
 
 type ConfigInterfaceResult {
@@ -210,6 +212,8 @@ type ConfigInterfaceResult {
   cssEnabled: Boolean
   """Interface language"""
   language: String
+  """Slideshow Delay"""
+  slideshowDelay: Int
 }
 
 """All configuration settings"""