[Feature] rewrite the dictionary panel logic

[xiaoyifang]

Is your feature request related to a problem? Please describe.

When add new folders , the panels of Dictionaries and Groups are recreated . Which has caused the whole page freeze ,

Describe the solution you'd like
I'd like to reuse the existed panels and refresh the data without recreating the panels.

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Another solution :

split this dialog into two dialogs. One with Sources ,the other will Dictionaries & Groups

Additional context
I suspected that this may have some connection with rarely crash on Macos. #574

[shenlebantongying]

Will the new menu confusing?

Based on #1881, the menu will become

Edit
  --> Sources
  --> Dictionaries
        --> Dictionaries
        --> Groups

The Dictionaries now becomes Dictionaries + Groups.

The Sources loses the master dialog of Edit Dictionaries, so will someone question the Sources of what?

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Personally, I like 3 dialogs #1606

Dictionaries (Change Edit -> Dictionaries)
  --> Add Sources
  --> Inspect Dictionaries
  --> Manage Groups

(or keep the Edit so that we can add #1695 under Edit)

[xiaoyifang]

What about

Edit
  --> Dictionary Sources
  --> Dictionaries & Groups
        --> Dictionaries
        --> Groups

[shenlebantongying]

I feel Dictionaries and Groups are two distinctive concepts that don't share a root name.

The old one avoids this problem by amalgamating everything together.

In Dictionaries & Groups, the Groups will be one level deeper, and requires one extra click to reach it.

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The Dictionaries's extra feature is 1. reordering dictionaries 2. disable some dictionaries.

Maybe we can just combine Dictionaries & Groups 😅

[xiaoyifang]

I feel Dictionaries and Groups are two distinctive concepts that don't share a root name.

groups based on dictionaries , they have tight connections.
If one dictionary got disabled in dictionaries panel, this dictionary will not show in groups panel

The old one avoids this problem by amalgamating everything together.

In Dictionaries & Groups, the Groups will be one level deeper, and requires one extra click to reach it.

The Dictionaries's extra feature is 1. reordering dictionaries 2. disable some dictionaries.

Maybe we can just combine Dictionaries & Groups 😅

too much effort ,can be in another PR