Admin role should imply manager

[ianroberts]

It always did in is_authenticated but behaviour was not consistent in login

Closes #320

[github-actions]

Jest Coverage

File	% Stmts	% Branch	% Funcs	% Lines	Uncovered Line #s
All files	80	77.37	74.19	79.92

Details

File	% Stmts	% Branch	% Funcs	% Lines	Uncovered Line #s
All files	80	77.37	74.19	79.92
_src/components	77.14	77.35	85.71	77.14
_ AnnotationRenderer.vue	76.23	77.35	84	76.23	126,141-142,196,219,240,247-261,269,275-285,319
_ MarkdownEditor.vue	100	100	100	100
_ MarkdownRenderer.vue	100	100	100	100
_src/components/annotation	80.95	86.66	82.35	80.95
_ CheckboxInput.vue	85.71	100	100	85.71	19
_ HtmlDisplay.vue	80	100	100	80	26-30
_ InputErrorDisplay.vue	100	0	100	100	19-25
_ RadioInput.vue	85.71	100	100	85.71	19
_ SelectorInput.vue	71.42	100	66.66	71.42	20,27
_ TextInput.vue	75	100	66.66	75	26
_ TextareaInput.vue	66.66	100	50	66.66	20
_src/enum	100	100	100	100
_ DocumentTypes.js	100	100	100	100
_src/jrpc	90.32	83.33	75	90.32
_ index.js	90.32	83.33	75	90.32	29,38-39
_src/utils	77.77	74.6	38.46	77.46
_ annotations.js	96.55	81.25	100	96.42	35
_ dict.js	100	100	100	100
_ index.js	55.88	54.54	11.11	55.88	9-14,28-93
_tests/unit	100	100	100	100
_ globalVue.js	100	100	100	100

[twinkarma]

Looks sensible to me, I'll merge it in