Update all references from 'electrum' to 'pallectrum' including:
- Directory paths in build scripts
- Application name and metadata
- Desktop entries and MIME types
- Android package configurations
- Windows installer settings
- User data directory locations
- Website URLs and project references
Before, the desktop entry file would only work correctly
if the user has added `$HOME/.local/bin` to his or her
PATH. The PATH variable is an implementation detail and
the user shouldn't be exposed to it.
Now, the shell is used to look for executables in the
aforementioned folder. System-wide installations remain
intact.
Adds the “Finance” category, which is specified as an additional category in the Desktop
Menu Specification. Also makes the GenericName a more generic as per the Desktop
Entry Specification.
