Cert Location Setting and Recently Used Strings (#39)

The certificate button for SNI auth now looks only at one location (either CurrentUser or LocalMachine) based on field in the Settings dialog.
The 10 most recently used cluster, database, and app ids are now stored in the user settings file and the list is updated each time a valid comparison is completed. Users can ignore this feature by continuing to type in their own strings or they can use the drop downs to populate a particular field.
---------

Co-authored-by: Ben Martens <benmar@microsoft.com>

SyncKusto/App.config

@@ -34,6 +34,9 @@
       <setting name="UseLegacyCslExtension" serializeAs="String">
         <value>True</value>
       </setting>
+      <setting name="CertificateLocation" serializeAs="String">
+        <value>CurrentUser</value>
+      </setting>
     </SyncKusto.Properties.Settings>
   </userSettings>
 </configuration>

SyncKusto/MainForm.cs

@@ -147,6 +147,16 @@ IDatabaseSchema TryGetSchema(Func<Either<IOperationError, DatabaseSchema>> schem
 
             spcSource.ReportProgress(string.Empty);
             spcTarget.ReportProgress(string.Empty);
+
+            // Save the cluster and databases used in recent history to populate the combo boxes for
+            // next time and then reload them both. (Note that combining save an reload into a
+            // single operation would mean that the source recent history list wouldn't contain
+            // whatever was just used in the target schema so we keep them as separate steps.)
+            spcSource.SaveRecentValues();
+            spcTarget.SaveRecentValues();
+            spcSource.ReloadRecentValues();
+            spcTarget.ReloadRecentValues();
+
             // Enable the update button now that a comparison has been generated.
             btnUpdate.Enabled = true;
         }

SyncKusto/Properties/Settings.settings

@@ -26,5 +26,17 @@
     <Setting Name="UseLegacyCslExtension" Type="System.Boolean" Scope="User">
       <Value Profile="(Default)">True</Value>
     </Setting>
+    <Setting Name="CertificateLocation" Type="System.String" Scope="User">
+      <Value Profile="(Default)">CurrentUser</Value>
+    </Setting>
+    <Setting Name="RecentClusters" Type="System.Collections.Specialized.StringCollection" Scope="User">
+      <Value Profile="(Default)" />
+    </Setting>
+    <Setting Name="RecentDatabases" Type="System.Collections.Specialized.StringCollection" Scope="User">
+      <Value Profile="(Default)" />
+    </Setting>
+    <Setting Name="RecentAppIds" Type="System.Collections.Specialized.StringCollection" Scope="User">
+      <Value Profile="(Default)" />
+    </Setting>
   </Settings>
 </SettingsFile>