Fixed #375 - update screenshots

build/screenshots/dark/accounts.png

build/screenshots/dark/categories.png

build/screenshots/dark/filter_1.png

build/screenshots/dark/filter_2.png

build/screenshots/dark/home.png

build/screenshots/dark/new_category.png

build/screenshots/dark/new_transaction_1.png

build/screenshots/dark/new_transaction_2.png

build/screenshots/dark/reports.png

build/screenshots/dark/settings.png

build/screenshots/dark/transactions.png

build/screenshots/light/accounts.png

build/screenshots/light/categories.png

build/screenshots/light/filter_1.png

build/screenshots/light/filter_2.png

build/screenshots/light/home.png

build/screenshots/light/new_category.png

build/screenshots/light/new_transaction_1.png

build/screenshots/light/new_transaction_2.png

build/screenshots/light/reports.png