v1.2005061610

Download the latest Kanmail here.

This release adds "copy on move" for better compatibility with label-style
providers (Gmail, Fastmail beta).

Also brings in a much improved error display with more information to
improve debugging, along with a bunch of fixes.

Changes:

• Add cache cleanup script.
• Add cache cleanup functions.
• Add __str__ methods to folder items.
• Extract cache key name into function.
• Better function name.
• Show traceback infomation in header errors, link to support doc.
• Include tracebacks for unexpected errors.
• Handle copy_on_move when dragging emails between columns.
• Default copy_on_move true if we're gmail.
• Add copy emails function to the base email store.
• Add copy_on_move setting.
• Respect the options.accountName filter on sync emails.
• Log a warning when trying to delete emails that don't exist.
• When moving emails rely on backend sync to update columns.
• Remove unused styles.
• Add settingsStore.getAccountSettings function.
• Fix account settings default (array not object).
• Fix how we store mapping of account/folder/uid -> email.
• Make the spec template able to generate onedir pyinstaller bundles.
• Remove the dist changelog on make clean.
• Remove upx.
• Move MACOSX_DEPLOYMENT_TARGET into settings.
• Remove --no-binary flag as not required/working.
• Update maintainer label in Dockerfile.
• Update Docker docs for kanmail user.