Completed the above modifications

• If we are switching from px to rem, switch; remove all the px comments, mb keep one to show what the base-level px is
• do not use calc. if some ratios seem unreadable, create a variable for them and use the variable
• remove all unused variables

back out the pythonpath stuff, add dep

debian python note

In D17815#406034, @bytesofman wrote:

would be a good change and help to get some of the css more standardized in Cashtab

would be a good change and help to get some of the css more standardized in Cashtab

better comments

mention which devices have a custom Trezor firmware

reflow release note

[Cashtab] Introduce CSS variables to make styling easier

use slip10 1.0.1 to better satisfy the trezorlib >= 1.0.1 requirements (the AppImage build works with 1.0.0, but with more recent versions of pip the conflict becomes an error)

update the repo and commit hash to ecash/2.8.9 tag from the Bitcoin ABC repo

factor the token detection into a wallet.has_tokens(coin) method and fix one more thing that could cause accidental spending of ALP tokens (for users who enabled "Spend only fused coins", if a token is sent to the same address as a fused coin)