Fixed #136 - export charts with new stage (in correct pixel values)

...budgetmaster/logic/chartGenerators/BarChartGenerator.java

...budgetmaster/logic/chartGenerators/PieChartGenerator.java

...eadlocker8/budgetmaster/logic/charts/CategoriesChart.java

...eadlocker8/budgetmaster/logic/charts/ChartExportable.java

src/de/deadlocker8/budgetmaster/logic/charts/LegendType.java

.../deadlocker8/budgetmaster/logic/charts/MonthBarChart.java

...deadlocker8/budgetmaster/logic/charts/MonthLineChart.java

...eadlocker8/budgetmaster/logic/report/ReportGenerator.java

...budgetmaster/logic/serverconnection/ExceptionHandler.java

...budgetmaster/logic/serverconnection/ServerConnection.java

...ter/logic/serverconnection/ServerConnectionException.java

src/de/deadlocker8/budgetmaster/logic/utils/FileHelper.java

src/de/deadlocker8/budgetmaster/logic/utils/Helpers.java

src/de/deadlocker8/budgetmaster/ui/CategoryController.java

src/de/deadlocker8/budgetmaster/ui/ChartController.java

src/de/deadlocker8/budgetmaster/ui/ChartTab.fxml

src/de/deadlocker8/budgetmaster/ui/Controller.java

...de/deadlocker8/budgetmaster/ui/ExportChartController.java

src/de/deadlocker8/budgetmaster/ui/HomeController.java

...de/deadlocker8/budgetmaster/ui/NewCategoryController.java