Enhancement: ListScreen Refactor and ui_elements.py

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About The Pull Request

This PR refactors the ListScreen.py and adds helpful elements to ui_elements.py (renamed image_button.py).

ui_elements.py

• Added UIModifiedScrollingContainer: this is not yet utilized, but I hope will help with customizing the look of scrollbars on scrolling containers
• Added UIImageVerticalScrollBar for use by UIModifiedScrollingContainer
• Added UIDropDownContainer to hold and control dropdowns
• Added UICheckBox to create and control checkboxes: not yet utilized
• Added UIBasicCatListDisplay to create and control cat list displays without the name of the cat
• Added UINamedCatListDisplay to create and control cat list displays with the name of the cat

ListScreen.py

• Essentially rewrote the whole screen
• Some slight cosmetic changes to cat list bar:
  • "show dead/living" is now "view dead/living" for clarity
  • "filtered by" is now "sort by" for clarity
• Added QoL page number input and first/last page buttons.
  • If player inputs a page number higher than the current max, the page will automatically switch to the last page and set the number to match.
  • If the player inputs a number below 1, the page will automatically switch to first page and set the number to match
• Various small visual quirks have been fixed, screen in general should feel nicer to use

Why This Is Good For ClanGen

Cleans up the code massively and makes it much easier to use on the dev side! The use of containers makes it easier to control elements as a whole and object_ids have been liberally applied to make the f2 debug much more helpful. QoL changes will make it easier to use on the player side.

Linked Issues

Fixes #2137

Proof of Testing

https://github.com/ClanGenOfficial/clangen/assets/115410010/4bf27df8-0411-47be-b986-f12436c7e5b1

Changelog/Credits

• Rewrote the ListScreen to make it easier for devs to work with
• Made some small cosmetic changes to the cat list bar:
  • "show dead/living" is now "view dead/living"
  • "filtered by" is now "sort by"
• Various small visual quirks on the cat list screen are fixed
• Last/First page buttons have been added
• Users can now input a page number to flip to
• Added helpful custom ui_elements to handle dropdowns, checkboxes, and cat list displays