Removal of project variable is not persisted on save

[florianesser]

In a project that contains a project variable, the removal of a variable via the settings dialog is not persisted to the project file upon save.

[Claudia-WE]

when removing the project variable and in addition change status of e.g. of OccuredValues in source data the removal is persisted. When closing the project a "Save changes ?" window will appear which is not the case when only the variable has been removed

[Claudia-WE]

To make it more clear: remove variable --> Apply and Close --> change not persisted remove variable and change status of e.g. occuredvalues --> Apply and Close --> change persisted

[Flaminietta]

This is what I observe:

1. if I create two or more project variables (test_variable.png);
2. and I use them for alignments of the kind "Formatted string" (variable_1.png and variable_2.png);
3. then, they are present in the final project file;
4. if then I delete the project variable test_variable_1 but don't delete the alignment itself, which uses it, I still find the variable in the project file;
5. if instead I delete the variable and delete the alignment (with right-click >> delete), then also in the project file the variable disappears and the change persists.

My conclusion would be that this might not be considered a bug but we can simply document it somewhere.