fix: enable the editor to save viewState

[kiwiwong]

简介

修复切换editor tab时，光标不会自动回到上次编辑位置的问题。

变更

• 在编辑器失去焦点时，保存当前的viewState
• EditorController的initEditorEvents方法由private改为public，并增加了getViewState方法

[codecov]

Codecov Report

Merging #696 (be74604) into main (ee1edf3) will increase coverage by 0.44%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main     #696      +/-   ##
==========================================
+ Coverage   90.88%   91.33%   +0.44%     
==========================================
  Files         189      189              
  Lines        5934     5942       +8     
  Branches     1425     1426       +1     
==========================================
+ Hits         5393     5427      +34     
+ Misses        534      508      -26     
  Partials        7        7              

Impacted Files	Coverage Δ
src/controller/editor.tsx	47.29% <100.00%> (+21.58%)	⬆️

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[wewoor]

+1