Fix whitespaces and typos

[ratijas]

• setup.py (config): This file contained a salad from tabs and spaces. I wonder how that even worked -- AFAIK Python 3 blows up with syntax error on mixed indents.

  (description): Fix typos in word "graphical".

• snapper-gui.desktop: Remove trailing whitespace.

• snappergui/*.py:

  Conformance to PEP8:

  • Remove redundant parentheses around if conditions.
  • Fix whitespaces between classes and methods.
  • Fix whitespaces around start of comments: 2+1 (_#).
  • Other whitespace and indentation fixes.

  (changesWindow::get_treestore_from_tree::get_childs):

  • Rename inner local function to get_children().
  • Rename argument tree to subtree to prevent variable shadowing.

  (changesWindow::_on_pathstree_selection_changed): Never compare to None though equality (==, !=); only through is and is not operators.

• changesWindow.py (StatusFlags): Align to the right and disable PyCharm formatter via comments.

[ricardomv]

Hi, thanks for all the work you did, this has been merged.

[ratijas]

Hi @ricardomv,

Thank you too. I'm glad to know the project is still maintained.

I saw an abandoned branch with some attempts to rewrite it with Qt/QML instead of Gtk. What happened? Life?

PS Would you mind, please, tagging this repo with hacktoberfest topic or adding hacktoberfest-accepted label to this PR? I don't insist, but it kinda wouldn't hurt.

[ricardomv]

I saw an abandoned branch with some attempts to rewrite it with Qt/QML instead of Gtk. What happened? Life?

Yes, i lost interest i was learning to use qml with c++ but the c++ was a bit too confusing.

PS Would you mind, please, tagging this repo with hacktoberfest topic or adding hacktoberfest-accepted label to this PR? I don't insist, but it kinda wouldn't hurt.

Sure, i can do it.