Created custom PushButton widget and added custom styleName property for styling primary buttons

src/Insight/UserInterfaces/InsightWindow/Widgets/PushButton.cpp

@@ -0,0 +1,8 @@
+#include "PushButton.hpp"
+
+namespace Bloom::Widgets
+{
+    PushButton::PushButton(QWidget* parent)
+        : QPushButton(parent)
+    {}
+}