In-app vault export support (#729)

* First pass at vault export UI

* Password validation via cryptoService

* Export service framework

* support for constructing json export data

* Support for constructing csv export data

* Cleanup and simplification

* Completion of vault export feature

* Formatting and simplification

* Use dialog instead of toast for invalid master password entry

src/App/Resources/AppResources.Designer.cs

@@ -1491,6 +1491,24 @@ namespace Bit.App.Resources {
             }
         }
         
+        /// <summary>
+        ///   Looks up a localized string similar to Enter your master password to export your vault data..
+        /// </summary>
+        public static string ExportVaultMasterPasswordDescription {
+            get {
+                return ResourceManager.GetString("ExportVaultMasterPasswordDescription", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized string similar to This export contains your vault data in an unencrypted format. You should not store or send the exported file over unsecure channels (such as email). Delete it immediately after you are done using it..
+        /// </summary>
+        public static string ExportVaultWarning {
+            get {
+                return ResourceManager.GetString("ExportVaultWarning", resourceCulture);
+            }
+        }
+        
         /// <summary>
         ///   Looks up a localized string similar to Extension Activated!.
         /// </summary>
@@ -1689,6 +1707,15 @@ namespace Bit.App.Resources {
             }
         }
         
+        /// <summary>
+        ///   Looks up a localized string similar to File Format.
+        /// </summary>
+        public static string FileFormat {
+            get {
+                return ResourceManager.GetString("FileFormat", resourceCulture);
+            }
+        }
+        
         /// <summary>
         ///   Looks up a localized string similar to File Source.
         /// </summary>
@@ -4065,6 +4092,15 @@ namespace Bit.App.Resources {
             }
         }
         
+        /// <summary>
+        ///   Looks up a localized string similar to Warning.
+        /// </summary>
+        public static string Warning {
+            get {
+                return ResourceManager.GetString("Warning", resourceCulture);
+            }
+        }
+        
         /// <summary>
         ///   Looks up a localized string similar to Website.
         /// </summary>