add test for https://redislabs.atlassian.net/browse/RI-3995

[nmammadli]

No description provided.

[vlad-dargel]

Good job, just need some updates.

And please think about adding some additional tests for Tree view:

1. When some folder with keys by delimiter selected and user adds a new key without delimiter - key should be displayed in "Keys" root folder
2. When some folder with keys by delimiter selected and user adds a new key with delimiter from other folder - key should be displayed in other folder and this folder should be selected
3. When some folder with keys by delimiter selected and user adds a new key with delimiter from the same folder - key should be displayed in the same folder

these cases must necessarily be covered, because this is a rather vulnerable functionality that often breaks

looks like you can add these tests inside the already existing 'Tree view navigations improvement tests'