Date Time Stamp use modified date format on new graph

Version: 2020b

Type: Features

Category: Graphing

Subcategory: Text Labels & Legends

Jira: ORG-20930

When text object name is timestamp, we support a copy of text object default for this name. Basically, it will need to contain all text, position, frame related format except text content.

When user click Date&Time Stamp button, we create text object with this default.

No matter which layer user selected, we only create Date&Time stamp for 1st layer. Since we will update when there is existing time stamp, so active other layer will just update time stamp of 1st layer.