Summary: This PR updates the performance Canvas widgets readability in Dev mode. Currently, for unknown for me reason, the text was rendered with stroke not fill, which results in blurry text. Also the color of texts and plot in light mode have not enough contrast in comparison to the background. I have tried to use `theme` in there, but unfortunately the CSS variables are not available in the Canvas context and using those values leads to always black text. ## Changelog * improve the performance canvas widgets readability in Development mode Pull Request resolved: https://github.com/facebook/flipper/pull/3333 Test Plan: The change has been testes by running the desktop Flipper app locally from source. ## Preview (before & after) #### Dark Mode <img width="189" alt="Screenshot 2022-01-23 at 17 46 20" align="left" src="https://user-images.githubusercontent.com/719641/150689046-28895487-d488-440f-9440-f792daeca86f.png"> <img width="189" alt="Screenshot 2022-01-23 at 17 54 59" src="https://user-images.githubusercontent.com/719641/150689179-5ef96ca3-78e0-4995-b60c-317a87082604.png"> #### Light Mode <img width="189" alt="Screenshot 2022-01-23 at 17 46 27" align="left" src="https://user-images.githubusercontent.com/719641/150689061-a3264961-390a-4182-bd81-ba84b6e4979f.png"> <img width="189" alt="Screenshot 2022-01-23 at 17 55 09" src="https://user-images.githubusercontent.com/719641/150689188-17efc7d9-7add-409e-af3b-befa5fbba0bc.png"> Reviewed By: aigoncharov Differential Revision: D33738722 Pulled By: lblasa fbshipit-source-id: b992ecacd31bb6aa2a53885ca6dcc858fa510775
flipper-ui-core (TBD)
Flipper's UI, agnostic of Electron vs Browser.