CopyQ main window in macOS not respecting "hide_main_window_in_task_bar" setting

**Describe the bug**
Even if hide_main_window_in_task_bar is set to false, CopyQ doesn't show it in the taskbar. Doing something and switching back to CopyQ without the mouse is impossible

**To Reproduce**
Steps to reproduce the behavior:
1. `copyq config hide_main_window_in_task_bar 0`
2. Exit CopyQ (just to make sure)
3. `copyq config hide_main_window_in_task_bar`
4. Still same (wrong) behavior

**Expected behavior**
When `copyq config hide_main_window_in_task_bar 0` the main window should show in the task switcher and I should be able to activate it without clicking on Mission Control or Show/Hide twice

**Screenshots**
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**Version, OS and Environment**
CopyQ Clipboard Manager v3.11.0
Qt: 5.13.2
Compiler: GCC
Arch: x86_64-little_endian-lp64
OS: macOS Mojave (10.14)

**Additional context**
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