TW-1636: UUID with numeric-only first segment is not parsed properly

- Switched Nibbler::getUUID to Nibbler::getPartialUUID, which caused partial
  UUID mathcing to fail sometimes.
- Changed precedence to search for UUID before ID, which solves the numeric
  UUID problem.

src/DOM.cpp

@@ -255,6 +255,17 @@ bool DOM::get (const std::string& name, const Task& task, Variant& value)
     std::string uuid;
     bool proceed = false;
 
+    if (n.getPartialUUID (uuid) && n.depleted ())
+    {
+      if (uuid == task.get ("uuid"))
+        ref = task;
+      else
+        context.tdb2.get (uuid, ref);
+
+      proceed = true;
+    }
+    else
+    {
       if (n.getInt (id) && n.depleted ())
       {
         if (id == task.id)
@@ -264,18 +275,6 @@ bool DOM::get (const std::string& name, const Task& task, Variant& value)
 
         proceed = true;
       }
-    else
-    {
-      n.restore ();
-      if (n.getUUID (uuid) && n.depleted ())
-      {
-        if (uuid == task.get ("uuid"))
-          ref = task;
-        else
-          context.tdb2.get (uuid, ref);
-
-        proceed = true;
-      }
     }
 
     if (proceed)

src/TDB2.cpp

@@ -115,7 +115,7 @@ bool TF2::get (int id, Task& task)
 }
 
 ////////////////////////////////////////////////////////////////////////////////
-// Locate task by uuid.
+// Locate task by uuid, which may be a partial UUID.
 bool TF2::get (const std::string& uuid, Task& task)
 {
   if (! _loaded_tasks)
@@ -123,7 +123,7 @@ bool TF2::get (const std::string& uuid, Task& task)
 
   for (auto& i : _tasks)
   {
-    if (i.get ("uuid") == uuid)
+    if (closeEnough (i.get ("uuid"), uuid, uuid.length ()))
     {
       task = i;
       return true;