Allow passing a "reset" argument to resize_window

docs/layouts.rst

@@ -248,6 +248,8 @@ action, for example::
    map ctrl+right resize_window wider
    map ctrl+up resize_window taller
    map ctrl+down resize_window shorter 3
+   # reset all windows to default sizes
+   map ctrl+home resize_window reset
 
 The ``resize_window`` action has a second, optional argument to control
 the resizing increment (a positive integer that defaults to 1).

kitty/options/utils.py

@@ -211,7 +211,7 @@ def resize_window(func: str, rest: str) -> FuncArgsType:
         args = ['wider', 1]
     else:
         quality = vals[0].lower()
-        if quality not in ('taller', 'shorter', 'wider', 'narrower'):
+        if quality not in ('reset', 'taller', 'shorter', 'wider', 'narrower'):
             log_error(f'Invalid quality specification: {quality}')
             quality = 'wider'
         increment = 1

kitty/tabs.py

@@ -316,6 +316,9 @@ class Tab:  # {{{
         See :ref:`window_resizing` for details.
         ''')
     def resize_window(self, quality: str, increment: int) -> None:
+        if quality == 'reset':
+            self.reset_window_sizes()
+            return
         if increment < 1:
             raise ValueError(increment)
         is_horizontal = quality in ('wider', 'narrower')