Improve layout and wording of the NSUserDefaults resetting startup key combo. Closes #3612 (#3657)

Author: cmsj

Hammerspoon/MJAppDelegate.m

@@ -137,13 +137,15 @@ - (void)applicationDidFinishLaunching:(NSNotification *)aNotification {
     if (CGEventSourceKeyState(kCGEventSourceStateCombinedSessionState,0x3A) && CGEventSourceKeyState(kCGEventSourceStateCombinedSessionState,0x37)) {
 
         NSAlert *alert = [[NSAlert alloc] init];
-        [alert addButtonWithTitle:@"Continue"];
-        [alert addButtonWithTitle:@"Delete Preferences"];
+        NSButton *deleteButton = [alert addButtonWithTitle:@"Delete Preferences"];
+        deleteButton.hasDestructiveAction = YES;
+
+        [alert addButtonWithTitle:@"Cancel"];
         [alert setMessageText:@"Do you want to delete the preferences?"];
-        [alert setInformativeText:@"Deleting the preferences will reset all Hammerspoon settings (including everything that uses hs.settings) to their defaults."];
+        [alert setInformativeText:@"Deleting the preferences will reset all Hammerspoon settings (including everything that uses hs.settings) to their defaults. This does not remove anything in ~/.hammerspoon/"];
         [alert setAlertStyle:NSAlertStyleWarning];
 
-        if ([alert runModal] == NSAlertSecondButtonReturn) {
+        if ([alert runModal] == NSAlertFirstButtonReturn) {
 
             // Reset Preferences:
             NSDictionary * allObjects;