Rename Row::right_boundary to end_boundary

This is more correct for RtL paragraphs.

src/Row.cpp

@@ -336,7 +336,7 @@ ostream & operator<<(ostream & os, Row const & row)
 	   << " descent: " << row.dim_.des
 	   << " separator: " << row.separator
 	   << " label_hfill: " << row.label_hfill
-	   << " right_boundary: " << row.right_boundary()
+	   << " end_boundary: " << row.end_boundary()
 	   << " flushed: " << row.flushed() << "\n";
 	// We cannot use the operator above, unfortunately
 	double x = row.left_margin;

src/Row.h

@@ -206,9 +206,9 @@ public:
 	///
 	pos_type endpos() const { return end_; }
 	///
-	void right_boundary(bool b) { right_boundary_ = b; }
+	void end_boundary(bool b) { end_boundary_ = b; }
 	///
-	bool right_boundary() const { return right_boundary_; }
+	bool end_boundary() const { return end_boundary_; }
 	///
 	void flushed(bool b) { flushed_ = b; }
 	///
@@ -368,7 +368,7 @@ private:
 	/// one behind last pos covered by this row
 	pos_type end_ = 0;
 	// Is there a boundary at the end of the row (display inset...)
-	bool right_boundary_ = false;
+	bool end_boundary_ = false;
 	// Shall the row be flushed when it is supposed to be justified?
 	bool flushed_ = false;
 	/// Row dimension.

src/TextMetrics.cpp

@@ -1059,7 +1059,7 @@ void cleanupRow(Row & row, bool at_end)
 	if (!at_end && !row.flushed())
 		row.back().rtrim();
 	// boundary exists when there was no space at the end of row
-	row.right_boundary(!at_end && row.back().endpos == row.endpos());
+	row.end_boundary(!at_end && row.back().endpos == row.endpos());
 	// make sure that the RTL elements are in reverse ordering
 	row.reverseRTL();
 }
@@ -1368,7 +1368,7 @@ pos_type TextMetrics::getPosNearX(Row const & row, int & x,
 		              || inset->lyxCode() == SEPARATOR_CODE))
 			pos = row.back().pos;
 		else
-			boundary = row.right_boundary();
+			boundary = row.end_boundary();
 	}
 
 	x += xo - offset;