Improvements for dark mode (#322)

* Action colors are now determined based on theme

* Fix unused import

* Update some more colors based on theme

* Updated release notes

* Better color choice

* Update for home screen

* Updates for app drawer

* remove unused import

assets/release_notes.md

@@ -6,6 +6,7 @@
 
 - Bug fix for stock history widget
 - Improved display of stock history widget
+- Theme improvements for dark mode
 
 ### 0.11.3 - April 2023
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