Improve input method support for windows [$20]

[lc-soft]

Problem

• The top left of the screen will display an input box.
• The candidate box is positioned at the top left of the screen.

Expected effect

• No additional controls will be displayed.
• The candidate box should be positioned at the text caret, like this:

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IssueHunt Summary

1354092549 has been rewarded.

Backers (Total: $20.00)

• lc-soft ($20.00)

Submitted pull Requests

• #175 fix #36

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[lc-soft]

#149

[IssueHuntBot]

@lc-soft has funded $20.00 to this issue.

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[issuehunt-oss]

@lc-soft has rewarded $14.00 to @1354092549. See it on IssueHunt

• 💰 Total deposit: $20.00
• 🎉 Repository reward(20%): $4.00
• 🔧 Service fee(10%): $2.00