Created GuiEntryListEntry interface for GuiEntryList contained classes to avoid toString() methods from having to be abused

Created GuiFileChooser and according Listeners
Added (non-functional) GuiAssetAdder for CustomImageObjects

src/main/java/eu/crushedpixel/replaymod/gui/elements/GuiAdvancedTextField.java

@@ -41,7 +41,7 @@ public class GuiAdvancedTextField extends GuiTextField implements GuiElement {
             super.setDisabledTextColour(hintTextColor);
             text = hint;
 
-            drawTextBox();
+            super.drawTextBox();
 
             text = "";
             super.setDisabledTextColour(disabledTextColor);