UI: Rename 'obs' dir to 'UI'

This is to prevent confusion both when prefixing commits and when
reading the directory structure for the first time.

UI/crash-report.hpp

@@ -0,0 +1,18 @@
+#pragma once
+
+#include <QDialog>
+
+class QPlainTextEdit;
+
+class OBSCrashReport : public QDialog {
+	Q_OBJECT
+
+	QPlainTextEdit *textBox;
+
+public:
+	OBSCrashReport(QWidget *parent, const char *text);
+
+public slots:
+	void ExitClicked();
+	void CopyClicked();
+};