"Duplicate" menu item has uppercase "D" for code blocks, but not sprites/costumes/backdrops.

[asweigart]

Expected Behavior

This is a minor but quick fix: Right-clicking on sprites, costumes, backdrops, and code blocks should have consistent casing for their context menu items. (This is for the English language.)

Actual Behavior

When right-clicking on a sprite, costume, or backdrop to bring up the context menu, the "duplicate" option has a lowercase "d" (similar to Scratch 2's menu) but right-clicking on a code block shows it has "Duplicate" with an uppercase "D".

This also applies to the lowercase "export" and "delete" context menu items.

Steps to Reproduce

Open a new project. Add any code block to the Code Area. Right-click and notice the capital "D" in "Duplicate". Right-click on the Sprite1 sprite icon in the Sprite List, and notice the lowercase "d" in "duplicate" for its menu.

Operating System and Browser

All platforms.

[adroitwhiz]

See also #1790, which is a broader issue about the differing conventions used across different types of menus.