Remove css for roi chart
Introduce ROI calc
use css from dev branch, add config options for roi chart
Add withdrawals to substract the reach amount
Improve and use modal dialogs.
Add tests for ROI chart
Merge branch 'master' of github.com:Yoldark34/zen_dashboard_enhancer into dev
Add changelog for v2.7.0 and v2.7.1 to the readme
Merge pull request #2 from Yoldark34/dev

Dev