Fixed clear regression series outside of for-loop.

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

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

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

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

src/main/java/com/application/GUI/Panes/CreateBottomBar.java

src/main/java/com/application/GUI/Panes/CreateLogoBar.java

src/main/java/com/application/GUI/Panes/CreateMenuBar.java

src/main/java/com/application/GUI/Panes/CreateSideBar.java

...ain/java/com/application/GUI/PopUpWindows/LoginPopup.java

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

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