Handle systems that use less -F as pagers

Fix #3740

docs/changelog.rst

@@ -20,6 +20,10 @@ To update |kitty|, :doc:`follow the instructions <binary>`.
 
 - macOS: Fix middle-click to paste from clipboard not working (:iss:`3730`)
 
+- When displaying scrollback ensure that the window does not quit is the amount
+  of scrollback is less than a screen and the user has the ``--quit-if-one-screen``
+  option enabled for less (:iss:`3740`)
+
 
 0.21.1 [2021-06-14]
 ----------------------

kitty/boss.py

@@ -906,6 +906,8 @@ class Boss:
                     if exe:
                         cmd[0] = exe
 
+        if os.path.basename(cmd[0]) == 'less':
+            cmd.append('-+F')  # reset --quit-if-one-screen
         tab = self.active_tab
         if tab is not None:
             bdata = data.encode('utf-8') if isinstance(data, str) else data