Make the add mark touch bar icon smaller. Issue 6285

iTerm2.xcodeproj/xcshareddata/xcschemes/iTerm2.xcscheme

@@ -63,6 +63,7 @@
       selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
       selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
       enableAddressSanitizer = "YES"
+      disableMainThreadChecker = "YES"
       language = ""
       launchStyle = "0"
       useCustomWorkingDirectory = "NO"
@@ -81,11 +82,6 @@
          </BuildableReference>
       </BuildableProductRunnable>
       <AdditionalOptions>
-         <AdditionalOption
-            key = "NSZombieEnabled"
-            value = "YES"
-            isEnabled = "YES">
-         </AdditionalOption>
       </AdditionalOptions>
    </LaunchAction>
    <ProfileAction