Don't hide other window

[bayashi]

Not sure details yet though, the panel of mclocks is hiding other window even if it's being seen to not overraped. So the panel size of mclocks should be correct as appearance.

[bayashi]

[Just investigated]

Only happen on:

• Windows (Mac doesn't have this issue. Not confirmed on Linux though)
• When the option alwaysOnTop is true

Some screen parts of Electron are hiding other screen's button.

To avoid this issue, you can set false to alwaysOnTop option if you can.