Updated linechart class to seperate the series from one single to multiple series

src/main/java/com/application/DB/Constants.java

src/main/java/com/application/DB/DB.java

src/main/java/com/application/GUI/InputPopUpWindow.java

...main/java/com/application/GUI/LineChartFunctionality.java

src/main/java/com/application/Main.java

target/classes/com/application/DB/Constants.class

target/classes/com/application/DB/DB.class

target/classes/com/application/GUI/InputPopUpWindow.class

.../classes/com/application/GUI/LineChartFunctionality.class