method to reset the machine view controller.

Ample/LaunchWindowController.m

@@ -715,6 +715,7 @@ static NSString *ShellQuote(NSString *s) {
     if (!d) {
         [self resetAll: sender];
         [self setMachine: nil];
+        [_machineViewController reset];
         [_slotController setMachine: nil];
         return;
     }

Ample/NewMachineViewController.h

@@ -15,6 +15,8 @@ NS_ASSUME_NONNULL_BEGIN
 
 @property (nullable) NSString *machine;
 
+-(void)reset;
+
 @end
 
 @interface NewMachineViewController (Table) <NSOutlineViewDelegate, NSOutlineViewDataSource>

Ample/NewMachineViewController.m

@@ -61,6 +61,11 @@
 
 }
 
+-(void)reset {
+    
+    [_outlineView deselectAll: nil];
+    [self setMachine: nil];
+}
 @end