refactor(popup): match styles/reduce paint flicker (#136)

* refactor: match popup styles/reduce paint flicker

* fix: useSchedules hook

* feat: popup ✨

* fix: repaint issue on popup body

* fix: initial active schedule

* fix: center justification

* fix: reactivity error

.editorconfig

@@ -0,0 +1,9 @@
+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf
+insert_final_newline = true
+trim_trailing_whitespace = true
+indent_size = 4
+indent_style = space