[atable] Fix atable modal attach to cell

[crabinak]

@Alchez @agritheory Here is a branch I came up with to hopefully solve #214 . I have this working by switching the modal to use absolute positioning, so it will move along with the scrolling without needing any scroll listeners (I ran into the same scroll listener issues in Histoire).

I also included the modal's ability to detect edges of its container (atable in this instance). Usually the modal will appear left along with the cell and below it, but if the modal would overflow off the right edge, it will instead adjust to butt up against the right edge of the container. If it would overflow below, it instead appears above the cell (the bottom 2 or three cells will use this behavior).

I tried to encapsulate most of this modal edge-detecting logic within ATableModal itself while keeping it fairly agnostic as to what its container or content will be.

I found it was easier to get positioning by using offsetLeft/Top to get the element position in its container (useElementSize was only giving me the position in the viewport). I felt like I was frantically duct taping this together while working on it, so there is probably room for improvement.

[github-actions]

Coverage Report for ./atable

Status	Category	Percentage	Covered / Total
🟢	Lines	72.24% (🎯 70%)	164 / 227
🟢	Statements	72.68% (🎯 70%)	173 / 238
🟢	Functions	82.22% (🎯 70%)	37 / 45
🔴	Branches	50.54% (🎯 70%)	92 / 182

File Coverage

File	Stmts	Branches	Functions	Lines	Uncovered Lines
Changed Files
atable/src/components/ACell.vue	94.33%	61.11%	100%	94.33%	106, 129-132, 163
atable/src/components/ATable.vue	56%	37.5%	88.88%	55.1%	108-112, 118-146
atable/src/components/ATableModal.vue	90%	75%	50%	90%	49
Unchanged Files
atable/src/utils.ts	100%	100%	100%	100%
atable/src/components/AExpansionRow.vue	0%	0%	0%	0%	33-3
atable/src/components/ARow.vue	58.33%	56.25%	50%	58.33%	50-64, 17
atable/src/components/ATableHeader.vue	100%	57.14%	100%	100%
atable/src/stores/table.ts	77.65%	53.03%	88.88%	77.64%	39-40, 53, 83-84, 122, 126-137, 164, 172-173, 179

Generated in workflow #504 for commit a75bd4b by the Vitest Coverage Report Action

[github-actions]

Coverage Report for ./aform

Status	Category	Percentage	Covered / Total
🟢	Lines	85.83% (🎯 70%)	200 / 233
🟢	Statements	85.29% (🎯 70%)	203 / 238
🟢	Functions	77.77% (🎯 70%)	42 / 54
🔴	Branches	68.46% (🎯 70%)	76 / 111

File Coverage

File	Stmts	Branches	Functions	Lines	Uncovered Lines
Changed Files
aform/src/components/form/ADate.vue	66.66%	66.66%	33.33%	66.66%	31, 41, 4
Unchanged Files
aform/src/components/AForm.vue	90%	40%	85.71%	90%	40-41
aform/src/components/base/CollapseButton.vue	100%	100%	100%	100%
aform/src/components/form/ACheckbox.vue	100%	100%	100%	100%
aform/src/components/form/AComboBox.vue	0%	0%	100%	0%	2-1
aform/src/components/form/ADatePicker.vue	94.91%	81.81%	92.85%	94.73%	68, 103, 29
aform/src/components/form/ADropdown.vue	91.48%	76.92%	84.61%	91.48%	55, 84-85, 93
aform/src/components/form/AFieldset.vue	87.5%	100%	50%	87.5%	8
aform/src/components/form/AFileAttach.vue	0%	0%	0%	0%	26-17
aform/src/components/form/ANumericInput.vue	100%	100%	100%	100%
aform/src/components/form/ATextInput.vue	100%	100%	100%	100%
aform/src/components/utilities/Login.vue	87.5%	88.88%	100%	87.5%	76-78
aform/src/directives/mask.ts	84.09%	59.09%	100%	83.72%	33-34, 41, 50, 65, 98, 103

Generated in workflow #504 for commit a75bd4b by the Vitest Coverage Report Action