ibus add inputh method not really been added, 'super + space' shortcut doesn't work

[Richard Ma]

What happens
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when I add an input method (Chinese Pinyin) with ibus TextEntrySettings in the status bar, it shows the adding operation successfully.

Then I found:
1. it works when I use mouse to switch the input method.
2. it doesn't work when I use 'super + space' to switch the input method.

Work around
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I run 'ibus-setup' in terminal, then found the new input method doesn't appear. when i add it in the 'ibus-setup' window, and restart the ibus, the 'super + space' shortcut works.