renamed a bunch of files and classes

src/widgets/helper/splitcolumn.hpp

@@ -0,0 +1,23 @@
+#pragma once
+
+#include <vector>
+
+#include "widgets/split.hpp"
+
+namespace chatterino {
+namespace helper {
+class SplitColumn
+{
+public:
+    SplitColumn();
+
+    void insert(widgets::Split *split, int index = -1);
+    void remove(int index);
+    double getFlex();
+    void setFlex(double flex);
+
+private:
+    std::vector<widgets::Split> items;
+};
+}
+}