Powerpoint Export: Export Text cards as text (instead of as images of text)

The PowerPoint export of dashboards is a huge time-saver, but for it to truly be useful, the text cards should export as text, rather than as images of text.  This would allow the text to be re-sized as appropriate. Right now resizing is basically impossible, as the text doesn't wrap (because it's an image) and the text gets blury if you expand it.

Furthermore, the dashboard text colors (both text color and background) are normally not wanted, as PowerPoint decks have their own slide master templates that control the look and feel of text.