Change "resize to fit" shortcut to Meta+w

Meta+x will be used for CUT (cut text to clipboard).

README.md

@@ -568,7 +568,7 @@ _`Meta` is typically the `Windows` key on the keyboard, or `Cmd` on macOS._
  | Rotate display left                                  | `Meta`+`←` _(left)_
  | Rotate display right                                 | `Meta`+`→` _(right)_
  | Resize window to 1:1 (pixel-perfect)                 | `Meta`+`g`
- | Resize window to remove black borders                | `Meta`+`x` \| _Double-click¹_
+ | Resize window to remove black borders                | `Meta`+`w` \| _Double-click¹_
  | Click on `HOME`                                      | `Meta`+`h` \| _Middle-click_
  | Click on `BACK`                                      | `Meta`+`b` \| _Right-click²_
  | Click on `APP_SWITCH`                                | `Meta`+`s`

app/scrcpy.1

@@ -220,7 +220,7 @@ Rotate display right
 Resize window to 1:1 (pixel\-perfect)
 
 .TP
-.B Meta+x, Double\-click on black borders
+.B Meta+w, Double\-click on black borders
 Resize window to remove black borders
 
 .TP

app/src/cli.c

@@ -198,7 +198,7 @@ scrcpy_print_usage(const char *arg0) {
         "    " MOD "+g\n"
         "        Resize window to 1:1 (pixel-perfect)\n"
         "\n"
-        "    " MOD "+x\n"
+        "    " MOD "+w\n"
         "    Double-click on black borders\n"
         "        Resize window to remove black borders\n"
         "\n"

app/src/input_manager.c

@@ -363,7 +363,7 @@ input_manager_process_key(struct input_manager *im,
                     screen_switch_fullscreen(im->screen);
                 }
                 return;
-            case SDLK_x:
+            case SDLK_w:
                 if (!shift && !repeat && down) {
                     screen_resize_to_fit(im->screen);
                 }