Fix login and startup logging issues

Auth uses the refresh endpoint instead of validate. This means less password entering.
Console will now only autoscroll when already scrolled all the way down.
Better conformance with the Yggdrasil auth protocol (not complete yet, but Mojang launcher isn't complete either).
Fix bug that prevented saving the account data (uninitialized variable).
Accounts can now trigger account list saving, this is used for the refresh endpoint.

gui/ConsoleWindow.h

@@ -38,6 +38,16 @@ public:
 	 */
 	void setMayClose(bool mayclose);
 
+private:
+	/**
+	 * @brief write a colored paragraph
+	 * @param data the string
+	 * @param color the css color name
+	 * this will only insert a single paragraph.
+	 * \n are ignored. a real \n is always appended.
+	 */
+	void writeColor(QString data, const char *color = nullptr);
+
 signals:
 	void isClosing();
 
@@ -51,15 +61,6 @@ slots:
 	 */
 	void write(QString data, MessageLevel::Enum level = MessageLevel::MultiMC);
 
-	/**
-	 * @brief write a colored paragraph
-	 * @param data the string
-	 * @param color the css color name
-	 * this will only insert a single paragraph.
-	 * \n are ignored. a real \n is always appended.
-	 */
-	void writeColor(QString data, const char *color = nullptr);
-
 	/**
 	 * @brief clear the text widget
 	 */
@@ -82,4 +83,6 @@ private:
 	Ui::ConsoleWindow *ui = nullptr;
 	MinecraftProcess *proc = nullptr;
 	bool m_mayclose = true;
+	int m_last_scroll_value = 0;
+	bool m_scroll_active = true;
 };