I would like to see some basic keyboard shortcuts implemented, examples are in the title. Most annoyingly Cmd + W doesn't close a tab but rather exits the document and leaves it open.

Below are some suggestions for shortcuts (shortcuts marked with '*' can be considered extra):

Window/Tab management:
- Cmd + W: closes the current tab
- *Cmd + Opt + W: closes all tabs
- Cmd + Shift + Esc: exits document view
- Cmd + Opt + Left/Right: Go to previous/next tab

File management:
- Cmd + Opt + N: Creates new File
- Cmd + Opt + Shift + N: Creates new Folder