Renaming symbols should check for existence

When renaming a symbol under cursor Creator seems not to check if the new name is used already. This can lead to bad errors afterwards.

What I mean in detail:

• create a simple C++ project
• add some global variables or class variables with different types OR/AND functions with different types of return values and parameter lists
• rename the different variables/functions step by step using the 'Rename symbol under cursor' feature to one of them that has already been used (or rename all to a complete new one) - but always use the same name for the variables or functions

Current behaviour:

• Creator won't refuse the renaming
• if you try to compile it later - you'll get the issues (conflicting declarations, XYZ has a previous declaration, call of overloaded XYZ() is abigous,...)

Suggested behaviour:

• Creator should check if the wanted new name is already in use
• if already in use Creator should bring up a warning or maybe even completely refuse to rename to this name

I know renaming depends normally on senseful name choices and the developer is the one to blame if this ends up in a mess. But especially inside bigger projects this would be helpful