Update 1.1.0.md

Author: punker76

docs/release-notes/1.1.0.md

@@ -35,3 +35,4 @@ This is a bug fix and fetaure release of MahApps.Metro.
 - Fixed foreground color of WindowComands and WindowButtonCommands #1788 #1503
 - Fixed PasswordBox with `ClearTextButton` doesnt show the button #1718
 - Fixed wrong text for buttons in dialogs (it's now preserve by default) #1793 #1755
+- Fixed usage of ClearTextButton: Subscribe to clear button even if control is already loaded. #1764 #1797