A lot of changes

Remove unused constructor of messages::Message
Fixed LimitedQueueSnapshot _-prefixes
Changed LimitedQueueSnapshot's usage of int to std::size_t
ColorScheme is no longer a singleton
Created a "BaseWidget" class which is pretty much a QWidget except it
has a reference of ColorScheme since most widgets will need a reference
to the style they should use.
BaseWidget can be implemented either with a BaseWidget parent (which
will copy the ColorScheme reference from the parent) or with a
normal QWidget parent and an explicit ColorScheme reference.
Save main window geometry on close
Fix font changing in the Settings Dialog
Update settings library version

src/widgets/notebooktab.hpp

@@ -7,6 +7,9 @@
 #include <boost/signals2/connection.hpp>
 
 namespace chatterino {
+
+class ColorScheme;
+
 namespace widgets {
 
 class Notebook;
@@ -22,6 +25,8 @@ public:
     explicit NotebookTab(Notebook *_notebook);
     ~NotebookTab();
 
+    ColorScheme &colorScheme;
+
     void calcSize();
 
     NotebookPage *page;
@@ -55,20 +60,20 @@ private:
     boost::signals2::connection _hideXConnection;
 
     QPropertyAnimation _posAnimation;
-    bool _posAnimated;
+    bool _posAnimated = false;
     QPoint _posAnimationDesired;
 
     Notebook *_notebook;
 
-    QString _title;
+    QString _title = "<no title>";
 
-    bool _selected;
-    bool _mouseOver;
-    bool _mouseDown;
-    bool _mouseOverX;
-    bool _mouseDownX;
+    bool _selected = false;
+    bool _mouseOver = false;
+    bool _mouseDown = false;
+    bool _mouseOverX = false;
+    bool _mouseDownX = false;
 
-    HighlightStyle _highlightStyle;
+    HighlightStyle _highlightStyle = HighlightStyle::HighlightNone;
 
     QRect getXRect()
     {