Fix overflow text on FileMigrationProcess

Author: neon-nyan

CollapseLauncher/Classes/FileMigrationProcess/UIBuilder.cs

@@ -143,7 +143,7 @@ private FileMigrationProcessUIRef BuildMainMigrationUI()
             };
 
             Grid mainGrid = UIElementExtensions.CreateGrid()
-                .WithWidth(600d)
+                .WithWidth(580d)
                 .WithColumns(new GridLength(1.0d, GridUnitType.Star), new GridLength(1.0d, GridUnitType.Star))
                 .WithRows(new GridLength(1.0d,    GridUnitType.Auto), new GridLength(20d,  GridUnitType.Pixel), new GridLength(20d, GridUnitType.Pixel), new GridLength(20d, GridUnitType.Pixel));