externalizes base url routes for controllers

.../deadlocker8/budgetmaster/accounts/AccountController.java

...dlocker8/budgetmaster/authentication/LoginController.java

...adlocker8/budgetmaster/categories/CategoryController.java

...a/de/deadlocker8/budgetmaster/charts/ChartController.java

.../deadlocker8/budgetmaster/controller/AboutController.java

...deadlocker8/budgetmaster/controller/BackupController.java

...eadlocker8/budgetmaster/controller/HotKeysController.java

.../deadlocker8/budgetmaster/controller/IndexController.java

...deadlocker8/budgetmaster/controller/TeapotController.java

.../de/deadlocker8/budgetmaster/filter/FilterController.java

...de/deadlocker8/budgetmaster/reports/ReportController.java

.../de/deadlocker8/budgetmaster/search/SearchController.java

...eadlocker8/budgetmaster/services/ErrorCodeController.java

...deadlocker8/budgetmaster/settings/SettingsController.java

...eadlocker8/budgetmaster/templates/TemplateController.java

...ker8/budgetmaster/transactions/TransactionController.java

...main/java/de/deadlocker8/budgetmaster/utils/Mappings.java

src/main/resources/templates/helpers/navbar.ftl

src/main/resources/templates/settings/settings.ftl

src/main/resources/templates/settings/settingsMacros.ftl