Use null to distinguish between home query and global query

Author: Jack251970

Flow.Launcher.Core/Plugin/QueryBuilder.cs

@@ -16,7 +16,8 @@ public static Query Build(string text, Dictionary<string, PluginPair> nonGlobalP
                     Search = string.Empty,
                     RawQuery = string.Empty,
                     SearchTerms = Array.Empty<string>(),
-                    ActionKeyword = string.Empty
+                    // must use null because we need to distinguish between home query and global query
+                    ActionKeyword = null
                 };
             }
 

Flow.Launcher.Plugin/Query.cs

@@ -53,6 +53,7 @@ public class Query
         /// <summary>
         /// The action keyword part of this query.
         /// For global plugins this value will be empty.
+        /// For home query this value will be null.
         /// </summary>
         public string ActionKeyword { get; init; }