…entName

In multiple projects I'm doing AST manipulation (fro example in Famix or in my project Chanel) and I need to remove some nodes from an AST. Currently it's possible only on MessageNodes but this should be possible on much more nodes. 
I propose to push up this method on ProgramNodes

If you recompile a class with extension methods and remove it afterward, then the class stays as obsolete. This happens because of a bug creating duplicated entries in the packages extension maps. 

I'm proposing a fix to not add new entries to the extension maps in case of recompilation. Coming with a comment and a regression test.

Fixes #17927

It is weird that the rules says to use `self class` when we are on the class side. I'm updating the rule name to show this possibility

Fixes #17123

Foward port of: #17470

Fixes #17511

When setting the seed, this change avoid to have a double initialization of the seed to speed it up.

```st
{ [ Random new ]. [ Random seed: 7 ] } collect: #bench.

"
Before:
an Array(
4,527,035 iterations in 5 seconds 2 milliseconds.905044.982 per second
2,578,191 iterations in 5 seconds 3 milliseconds. 515329.003 per second)"

 "
After:
an Array(
4,839,828 iterations in 5 seconds 1 millisecond. 967772.046 per second
5,454,942 iterations in 5 seconds 2 milliseconds. 1090552.179 per second)"
```

Fixes #17510

In Calypso Hernan started to migrate commands from Commander1 to Commander2. This brought a change in the logic but the commands in the extra group on methods lost the ability to execute the #prepareFullExecution method which cause some commands to fail.

I'm fixing this + I renamed a class to have a better name

Fixes #17506

Fix the logic of the extra commands on methods

Speedup Random initialization from seed

…-a-RGVariable

[Foward port] RGGlobalVariable should be a RGVariable

Improve ReRefersToClassRule name

Fix issue 17908 - Rename argument

Push up #removeFromTree from MessageNode to ProgramNode

Fix bug with obsolete classes and extension methods