*Steps to reproduce:*
# Open a Unity Project
# Create a new Input Action Asset via GameObject > Create > Input Actions
# Create another new Input Action Asset via GameObject > Create > Input Actions
# Open the first Input Action Asset in Input Actions Editor by double clicking on it
# Ensure that the 'Auto-Save' option is not enabled
# Make a change so there are unsaved changes (e.g. add a new Action Map)
# Click the 'X' to close the window
# Observe that an Unsaved changes pop-up appears on the screen. This is expected behaviour.
# Cancel the close 
# Double click on the other Input Action Asset to open it in Input Actions Editor

*Actual results:* The other Input Action Asset is opened in the window. However, the Unsaved Changes Pop-up never occurs and all unsaved changes from the first Input Action Asset are lost

*Expected results:* Before the other Input Action Asset is opened in the window, the Unsaved Changes Pop-up occurs and allows the user to Save, Don't save or Cancel.

*Reproducible with versions:* 7000, 1.11.2, 1.8.0

*Not reproducible with versions:* 1.8.0-pre.2

*Can't test with versions:* - 

*Tested on (OS):* Windows 11

*Notes:* 
* In versions before 1.8.0, opening a new Input Action Asset would open it in a new window, and so this issue did not occur