Adjust dialog size to accomodate chart editor dialog.
Adjust dialog size to accomodate chart editor dialog.

dq922/PerfKitExplorer,GoogleCloudPlatform/PerfKitExplorer,dq922/PerfKitExplorer,dq922/PerfKitExplorer,GoogleCloudPlatform/PerfKitExplorer,GoogleCloudPlatform/PerfKitExplorer,GoogleCloudPlatform/PerfKitExplorer,dq922/PerfKitExplorer