- fix color always set to red after rounded 7
- reformat code with Prettier format

- fix popup page can not automatically highlight typed words issue
- fix empty string store issue
- change font family
- change love link to xenkuo.github.io

Change Windows and Linux shortcut from Ctrl to Alt. More friendly to users.

Here is v1.1.1, a big release that added some critical features, especially shortcuts, of course the bugfix:
- remove allframe option, which will cause unexpected highlight result
- add `auto` item in context menu
- add three shortcuts

The shortcuts include:
* highlight with auto color: ctrl/cmd+shift+2
* enable/disable highlight: ctrl/cmd+shift+e
* clear highlight: ctrl/cmd+shift+x

fix context menu can't move highlight issue

- change `clear` button color from grey to default green.

- add `clear` button to clear all the highlight words with one click
- refine look and feel
- refine code implementation

Change logo link from github page to patreon page.

Use iconfont file instead of hyperlink.

Remove the tail and head sspace when selecting words using context menu.