Don't use margins in FileSystemPathEdit widgets.

Introduced in 30081e0.

src/gui/fspathedit.cpp

@@ -182,6 +182,7 @@ FileSystemPathEdit::FileSystemPathEdit(Private::FileEditorWithCompletion *editor
     editor->widget()->setParent(this);
 
     QHBoxLayout *layout = new QHBoxLayout(this);
+    layout->setContentsMargins(0, 0, 0, 0);
     layout->addWidget(editor->widget());
     layout->addWidget(d->m_browseBtn);