Add Minor fixes

Author: z1nc0r3

Plugins/Flow.Launcher.Plugin.Explorer/Languages/en.xaml

@@ -64,7 +64,7 @@
     <system:String x:Key="plugin_explorer_Directory_Recursive_Search_Engine">Directory Recursive Search Engine</system:String>
     <system:String x:Key="plugin_explorer_Index_Search_Engine">Index Search Engine</system:String>
     <system:String x:Key="plugin_explorer_Open_Window_Index_Option">Open Windows Index Option</system:String>
-    <system:String x:Key="plugin_explorer_Excluded_File_Types">Ignored File Types (comma seperated)</system:String>
+    <system:String x:Key="plugin_explorer_Excluded_File_Types">Excluded File Types (comma seperated)</system:String>
     <system:String x:Key="plugin_explorer_Excluded_File_Types_Tooltip">For example: exe,jpg,png</system:String>
 
     <!--  Plugin Infos  -->

Plugins/Flow.Launcher.Plugin.Explorer/ViewModels/SettingsViewModel.cs

@@ -518,7 +518,8 @@ public string ExcludedFileTypes
             get => Settings.ExcludedFileTypes;
             set
             {
-                string sanitized = string.IsNullOrEmpty(value) ? value : value.Replace(" ", "").Replace(".", "");
+                // remove spaces and dots from the string before saving
+                string sanitized = string.IsNullOrEmpty(value) ? "" : value.Replace(" ", "").Replace(".", "");
                 Settings.ExcludedFileTypes = sanitized;
                 OnPropertyChanged();
             }