improve path component usage

[lgl017temp]

improve path component
1.tab can input selected value
2.put current dict into options
3.allow not exists

To minimize changes, hidden internal API _clearUserInput and _setUserInput was used; a refactoring is recommended.

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[43081j]

i think these need more discussion before a PR.

as far as I understand, this is what you've added:

• exists is a way to allow the user to enter paths which don't exist
• you can now press tab to append the selected path to the user input, and continue typing
• add the current user input to the list of results (? not sure why)

but already these are 3 distinct changes which each need to be discussed before we decide if to do them or not.

[lgl017temp]

i think these need more discussion before a PR.

as far as I understand, this is what you've added:

• exists is a way to allow the user to enter paths which don't exist
• you can now press tab to append the selected path to the user input, and continue typing
• add the current user input to the list of results (? not sure why)

but already these are 3 distinct changes which each need to be discussed before we decide if to do them or not.

1. Sometime I need select a output path, it may be not exists, I want accept a don't exist dir then call mkdir, better than I create it in explore manually.
2. When I want into a dir, I must input full name manually. So I want provide a quickly way, like terminal.
3. [Bug] path directory cant direct select default value #477 At first I just want fix it, then you fix it too. But when I test it, I found you not use sep, it cause not list sub dir when ends with "\". And When combined with the second point, i need add "\" manually. So I keep my solution.