Mobile component(s) getting deleted from Admin UI

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Symptom
Wrong mobile component(s) is getting deleted while unassigning device configuration.
Context for a problem:
- Device Configuration DC1 with a Mobile Component app1
- Device Configuration DC2 with a Mobile Component app2
Example:
1) Assign DC1 and DC2 to DevID from Admin UI
2) Unassign DC2 from DevID and this elimite a Mobile Component app1.
Other terms
Status, Admin UI, Device configuration, User, [...]

Widths of Hierarchical Table Columns cannot be personalised

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Symptom
The personalisation of the property “width” of hierarchical table columns (i.e. the Web Dynpro ABAP View Elements TreeByKeyTableColumn and TreeByNestingTableColumn) doesn’t work.
For instance, it is not possible to change the width of a hierarchical table column or a neighbouring column via drag and drop. Instead, either nothing happens or the neighbouring column [...]

Added Cases dissappearing in Case Hierarchy

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Symptom
In CRM Case Management 5.2 and higher releases, cases linked to parent case through case hierarchy assignment block are disappearing.
Other terms
CL_CRM_CASE_API, GET_VICINITY, Case Hierarchy, HierarchyTreeOverview,
HierarchyTreeEdit.
Reason and Prerequisites
Reason:
Basis Case Management changed their api (CL_SCMG_CASE_API->GET_VICINIY)
Prerequisites:
Should have already applied Basis Note 1169579
Solution
Implement the attached correction instructions.