[TASK] Refactor menu VHs to increase readability
[BUGFIX] Fix usage of getMenu after refactoring
[BUGFIX] Fix usage of getRootLine after refactoring
[BUGFIX] Add missing variable, ensure array as return value
[DOC] Add hint about cached contexts
Merge pull request #54 from dreipunktnull/viewhelpers/condition/ismobile

[DOC] Add hint about cached contexts
Merge pull request #53 from dreipunktnull/menu

[TASK] Refactor menu ViewHelpers
[FEATURE] Try ViewHelper capable of deep error handling