[poincare] In Simplification order, matricial node are the biggest nodes

Change-Id: I2c5e391eb6f6476123199906575485c8635eb672

poincare/include/poincare/expression.h

@@ -96,7 +96,6 @@ public:
     BinomialCoefficient,
     Ceiling,
     ComplexArgument,
-    ConfidenceInterval,
     Conjugate,
     Derivative,
     Determinant,
@@ -115,16 +114,12 @@ public:
     Integral,
     LeastCommonMultiple,
     Logarithm,
-    MatrixDimension,
-    MatrixInverse,
     MatrixTrace,
-    MatrixTranspose,
     NaperianLogarithm,
     NthRoot,
     Opposite,
     Parenthesis,
     PermuteCoefficient,
-    PredictionInterval,
     Product,
     RealPart,
     Round,
@@ -135,6 +130,11 @@ public:
 
     Complex,
     Matrix,
+    ConfidenceInterval,
+    MatrixDimension,
+    MatrixInverse,
+    MatrixTranspose,
+    PredictionInterval,
     SimplificationRoot,
   };
   enum class FloatDisplayMode {