Fix scrolling-to-the-top bug

Author	DaveJarvis <email>
Date	2020-06-20 20:06:04 GMT-0700
Commit	760033fe289bb9602dbb7b9a57b99b4d323e8f92
Parent	fc5c257
Delta	3 lines added, 24 lines removed, 21-line decrease

src/main/java/com/scrivenvar/processors/markdown/BlockExtension.java

		import org.jetbrains.annotations.NotNull;

		+import static com.scrivenvar.Constants.PARAGRAPH_ID_PREFIX;
		+
		/**
		* Responsible for giving most block-level elements a unique identifier

		// does not count as a blank line. Resolving this issue is tricky.
		if( node instanceof Block && !(node instanceof BlockQuote) ) {
		- attributes.addValue( "id", "para-" + mCount++ );
		+ attributes.addValue( "id", PARAGRAPH_ID_PREFIX + mCount++ );
		}
		}

src/main/java/com/scrivenvar/FileEditorTab.java

		import javafx.beans.property.SimpleBooleanProperty;
		import javafx.beans.value.ChangeListener;
		-import javafx.beans.value.ObservableValue;
		import javafx.event.Event;
		import javafx.event.EventHandler;

		import javafx.stage.Window;
		import org.fxmisc.richtext.StyleClassedTextArea;
		-import org.fxmisc.richtext.model.TwoDimensional.Position;
		import org.fxmisc.undo.UndoManager;
		import org.mozilla.universalchardet.UniversalDetector;

		import static java.nio.charset.StandardCharsets.UTF_8;
		import static java.util.Locale.ENGLISH;
		-import static org.fxmisc.richtext.model.TwoDimensional.Bias.Forward;

		/**

		getEditor().moveTo( offset );
		getEditor().requestFollowCaret();
		- }
		-
		- /**
		- * Returns the caret's current row and column position.
		- *
		- * @return The caret's offset into the document.
		- */
		- public Position getCaretOffset() {
		- return getEditor().offsetToPosition( getCaretPosition(), Forward );
		- }
		-
		- /**
		- * Allows observers to synchronize caret position changes.
		- *
		- * @return An observable caret property value.
		- */
		- public final ObservableValue<Integer> caretPositionProperty() {
		- return getEditor().caretPositionProperty();
		}

src/main/java/com/scrivenvar/MainWindow.java

		import org.controlsfx.control.StatusBar;
		import org.fxmisc.richtext.StyleClassedTextArea;
		-import org.fxmisc.richtext.model.TwoDimensional;

		-import java.io.File;
		import java.nio.file.Path;
		import java.util.HashMap;