Link to Issue and Feedback tracker in Dashboard

[winsmith]

Discussed in https://github.com/TelemetryDeck/Issues/discussions/448

^{Originally posted by mattcorey September 6, 2024} I had an idea I wanted to post while looking at my dashboards, but I couldn't find any link to report a bug or give feedback. I knew there was one in the footer of a webpage somewhere -- I ended up having to type 'telemetrydeck.com' to get to the main page, and found the link there. Would be great to have that a standard footer on the dashboard pages as well! (and probably should have the copyright, terms and privacy links as well?)

Daniel's comment: We have such a button in the Insight Editor, but it makes a lot of sense to show it directly in the footer or in a dropdown menu on all pages.