#455 - setting for schedule (every x days + hour)

.../de/deadlocker8/budgetmaster/settings/AutoBackupTime.java

...n/java/de/deadlocker8/budgetmaster/settings/Settings.java

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

...de/deadlocker8/budgetmaster/settings/SettingsService.java

.../deadlocker8/budgetmaster/settings/SettingsValidator.java

src/main/java/de/deadlocker8/budgetmaster/utils/Strings.java

src/main/resources/languages/_de.properties

src/main/resources/languages/_en.properties

src/main/resources/static/js/helpers.js

src/main/resources/static/js/settings.js

src/main/resources/static/js/transactions.js

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

...resources/templates/transactions/newTransactionNormal.ftl

...ources/templates/transactions/newTransactionRepeating.ftl

...sources/templates/transactions/newTransactionTransfer.ftl

src/main/resources/templates/transactions/transactions.ftl