Dashboard - Activitiy refinements

**Is your feature request related to a problem? Please describe.**
Some problems are from old builds, some are new from the last RC:

- Action filter drop down menu without scroll bars
- Action filter drop down menu tooltip above, to not hide filter options

- Remove tooltip for Invert price and Go to market
- Add trading column/icon like in Open Orders
- Allow switching pairs by simple click, like in Open Orders
- Switch asset text from sold to buy, when inverting price

Start by locating the Dashboard Activity view and comparing it with the Open Orders view, which the issue names as the reference. Verify the filter menu, tooltips, trading column or icon, pair switching, and inverted-price text against the requested behavior.

Written by the indexing model from the issue text.