Using only VarMutable instead of the old VarMutableScript mixed variable

...lugins/tprovoost/scripteditor/scriptblock/Javascript.java

...gins/tprovoost/scripteditor/scriptblock/Pythonscript.java

...ugins/tprovoost/scripteditor/scriptblock/ScriptBlock.java

...oost/scripteditor/scriptblock/editor/VarScriptEditor.java

...ovoost/scripteditor/scriptblock/script/DefaultScript.java

...ins/tprovoost/scripteditor/scriptblock/script/Script.java

...ins/tprovoost/scripteditor/scriptblock/var/VarScript.java