Liferay Popup displays " " in modal-title if no title is defined

• Type: Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: 7.1.X, 7.2.X, 7.3.X, Master
• Fix Version/s: 7.1.10 DXP FP21, 7.1.X, 7.2.X, 7.3.X, Master
• Component/s: JS APIs and Utilities > Frontend JS Web API
• Labels:
  • ee-ts
  • liferay-fixpack-dxp-21-7110
• Branch Version/s:
  7.3.x, 7.2.x, 7.1.x
• Backported to Branch:
  Committed
• Fix Priority: 3
• Git Pull Request: https://github.com/liferay-frontend/liferay-portal/pull/702

Reproduction steps:
1) Start a master bundle
2) Open up the browser's console with F12 (no need to login into Liferay)
3) Paste this snippet and hit enter:

Liferay.Util.openWindow({
    dialog: {
        modal: true,
        width: 500,
        centered: true,
        draggable: false,
        resizable: false,
        cssClass: 'classRed',
        bodyContent: 'Test dialog box'
    },
    id: 'confirmationDialogId'
});

4) A pop-up will open. Observe the top part where the title usually appears:

Expected:
No title to appear

Actual behavior:

" "

will be displayed as a title