Apply themed horizontal gridline color in timeline-chart when switching themes

[bhufmann]

#442 changed the color for horizontal and vertical gridline colors and they are not the same anymore. When switching the theme from dark to light (or vice versa) then the horizontal gridline color is not updated until either new TimeGraphRows are created or the view is closed and opened again. The reason is that the TimeGraphRow objects are created once and the row style is created using the rowStyleProvider instantiated in the TimegraphOutputComponent.

This issue is track the changes needed in the theia-trace-extension and timeline-chart to allow switch the horizontal line colors dynamically at theme change.

[ebugden]

Since this issue has to do with legibility and consistent theming of charts, I would argue it fits into the "Read and navigate a chart" project. I'll give the project a detailed description to clarify. (The "Open relevant views" project has to do with which analyses are available and whether they provide analytical value with the data in the trace.)

(Same comment for #481)

Thank you for taking extra the time to sort new issues into projects! Let me know if any projects have titles or descriptions that aren't clear.

[bhufmann]

Since this issue has to do with legibility and consistent theming of charts, I would argue it fits into the "Read and navigate a chart" project. I'll give the project a detailed description to clarify. (The "Open relevant views" project has to do with which analyses are available and whether they provide analytical value with the data in the trace.)

(Same comment for #481)

Thank you for taking extra the time to sort new issues into projects! Let me know if any projects have titles or descriptions that aren't clear.

@ebugden thanks for the clarification. Yes, I'm a bit lost which project to assign new issue. I just looked at other trackers in the project to decide where to put. Please provide some clarification the project.

[ebugden]

Added description to "Navigate and read a chart": "Navigation features and core chart elements (ex. axes, labels, gridlines) that make it possible for a user to read and explore chart data." How does that sound?

(Now that people may start using Github projects more, maybe we should do a general review of whether they are set up well?)

Can I swap the project assignment to "Navigate and read a chart"?

[bhufmann]

Added description to "Navigate and read a chart": "Navigation features and core chart elements (ex. axes, labels, gridlines) that make it possible for a user to read and explore chart data." How does that sound?

Sounds better.

(Now that people may start using Github projects more, maybe we should do a general review of whether they are set up well?)

Can I swap the project assignment to "Navigate and read a chart"?

Yes, you can change it.