PhpStorm and git: how hide files not commited during checkout?

Hi to all,

I'm using PHPStorm 2018.3.4.

My current git work method is following:

• master: in-production branch, tagged
• development: branch from wich I checkout a feature-somefeature branch and where I merge the feature after all tests went OK.

So, for example, my work is

git checkout -b feature-adduser
[...] hard work with TDD
git add . && git commit -m "Add feature Adduser"
git push --set-upstream origin feature-adduser

On github (because I have travis and scrutinizer and codecov perform their auto checks) I merge the feature-adduser branch into develop. After merging, in local...

git checkout development
git pull --no-ff
git checkout -b feature-newfeature
[...] hard work
git add . && git commit -m "Implements new feature"

And so on.

In reality, using PHPStorm I right-click on files and click on "commit" directly, after that in terminal I launch the git push[...] command.

Now, I want to learn a can-be-possible scenario.

I'm in feature-addfeature branch (only on local, at the moment). I edited README.md and added IPTest.php under Tests.

My boss calls me and I need to place a hotfix.

In theory, I would

git checkout development
git pull --no-ff
git checkout -b hotfix-cannotlogin
[...]hard work
git push --set-upstream origin hotfix-cannotlogin

and merge with github.

The issue that I have, I did stage the modified/added files under feature-addfeature (via VCS > Git > Stage files) or via git add ., but, when I switch branch from feature-addfeature to develop, I have visible the new files and the edited file. Is it normal? Is there a mode to hide them? Am I wrong with use of stage?

Sorry for long explain.