Although it is trivial, I hope this can get fixed.
1. In dark theme, the caret/cursor color in the editable combobox is black, making it hard to see the caret.
2. The dropdown behavior of an editable combobox is different from the standard behavior. The dropdown should open only if the dropdown button is clicked, which is the standard behavior of an editable WPF combobox. Now the dropdown will also open if the user clicks the blank textbox area, which is actually the behavior of an uneditable combobox, it's inconvenient if the user wants to place the caret at the end of the text to edit.
