Hope the toolbar icon and user-defined settings to display the required functions

[sunyis]

In the background settings, add custom toolbar function icon display switch

Users can customize the display of required functions

Syntaxhighlighter2/scripts/shBrushGo.js is missing in version 2.x

Replace it with 3.x to fix the problem of excessive layout on the page of the mobile phone.

After opening the line number, can manual copying not allow copying of the line number

The width layout of the line number can be set to be smaller. When copying the code, the layout of the line number is modified to prevent copying to the line number.