Adapt to 2021-07 change in SE CSS/HTML for .grid to .d-flex.
Change default to not show when downvote will Roomba (supersedes #41).
Don't limit width when not in the sidebar (resolves #42).
Change to use userscript utilities version of executeInPage.
Use page theme (i.e. dark mode support) for options popup.
Adapt to 2021-07 change in SE CSS/HTML for
.gridto.d-flex. Change default to not show when downvote will Roomba (supersedes #41). Don't limit width when not in the sidebar (resolves #42). Change to use userscript utilities version of executeInPage. Use page theme (i.e. dark mode support) for options popup.