This reduces the amount of magic numbers used, some images will scale to bigger sizes, most of the icons and images in vertical mode will be bigger, thumbnails should be bigger in both modes.
Use f-strings
Avoid unnecessary casts to str()bool()int()
Ensure file closure
Merge nested ifs
Simplify for-assigns-appends with comprehensions and internal functions
Avoid shadowing internal function names
Initialize variables
Return value directly instead of assign then return
Make some methods static
* screen/printer_select/splash_screen: Updates to allow changing between moonraker instances
* Updates to multiple printers
* settings: Display printer endpoints
* Update macros to be on a per-printer basis
* files: Changes to clear out file cache on printer switch
* job_status: Redo page for action bar
* splash_screen: Change icon
* websocket: Actually close the websocket
* printer: Fix error case
* splash_screen: show buttons update
* readme update
