Auto-centred dialogue is mispositioned on Xinerama supporting desktops

[dphlin]

The left and top offsets of chrome.windows.update() are relative to the display's origin. On a system with multiple screens, the value of screen.left and screen.top must be added to the value specified in chrome.windows.update().

resizeDialog(true) does not add the offset, leading to a window spanning multiple monitors.

diff --git a/extension/dialog.js b/extension/dialog.js
index a7a875b..b736f09 100644
--- a/extension/dialog.js
+++ b/extension/dialog.js
@@ -93,8 +93,8 @@ function resizeDialog(/*boolean*/ moveDialog) {
         chrome.windows.update(chrome.windows.WINDOW_ID_CURRENT, {
             width: WIDTH,
             height: HEIGHT,
-            left: Math.floor((screen.availWidth - WIDTH) / 2),
-            top: Math.floor((screen.availHeight - HEIGHT) / 2),
+            left: screen.left + Math.floor((screen.availWidth - WIDTH) / 2),
+            top: screen.top + Math.floor((screen.availHeight - HEIGHT) / 2),
         }, function() {
             resizeDialog(false);
         });

[Rob--W]

Thanks for this suggestion! Do you want to open a pull request so you can get proper credit in the commit history for proposing this fix?