We have recently upgraded the Text-Editor, a third-party application called 'CKEditor', to the latest version: CKEditor-4.6.2-released.
Here is the list of keyboard shortcuts available: CKEditor Shortcuts Guide
A notable change is the Ctrl+Shift+V shortcut, which applies the previously copied inline formatting to a text fragment.
This shortcut no longer works but the functionality still exists. There is a button on the toolbar to paste content as text: