Fix #113111: Connect Vertex Pair precission issue on large models

Make the threshold epsilon proportional to the max vertex coord to
compensate.

@@ -41,3 +41,3 @@
  */
 
-#define CONNECT_EPS 0.0001f
+#define CONNECT_EPS 0.00001f

@@ -82,6 +82,7 @@ struct PathContext {
   HeapSimple *states;
   float matrix[3][3];
   float axis_sep;
+  float connect_eps;

@@ -617,6 +618,8 @@ void bmo_connect_vert_pair_exec(BMesh *bm, BMOperator *op)
   {
     pc.states = BLI_heapsimple_new();
     pc.link_pool = BLI_mempool_create(sizeof(PathLink), 0, 512, BLI_MEMPOOL_NOP);
+    pc.connect_eps = CONNECT_EPS *

@@ -618,2 +619,4 @@
     pc.states = BLI_heapsimple_new();
     pc.link_pool = BLI_mempool_create(sizeof(PathLink), 0, 512, BLI_MEMPOOL_NOP);
+    pc.connect_eps = CONNECT_EPS *
+                     std::max(1.0f, std::max(len_v3(pc.v_pair[0]->co), len_v3(pc.v_pair[1]->co)));