Scheduler - Appointment Form - Fix icons for resources with multiple selection

[Tucchhaa]

No description provided.

[Copilot]

Pull request overview

This PR fixes icon alignment in the Scheduler appointment form for resources with multiple selection and custom icons. Previously, icons were only aligned for specific groups (description, recurrence settings) but not for resource groups when custom icons were used, resulting in misaligned icons when resources had allowMultiple: true and custom icon properties.

Key Changes:

• Generalized icon margin-top styling to apply to all form group icons
• Renamed SCSS variables from *-description-icon-margin-top to *-icon-margin-top for broader applicability
• Added exceptions for date-range and recurrence-end groups where the margin is not needed
• Added visual regression test for resource fields with multiple selection and custom icons

Reviewed changes

Copilot reviewed 8 out of 9 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
packages/devextreme-scss/scss/widgets/material/scheduler/_sizes.scss	Renamed variable from $material-scheduler-appointment-popup-description-icon-margin-top to $material-scheduler-appointment-popup-icon-margin-top across all size variants
packages/devextreme-scss/scss/widgets/material/scheduler/_index.scss	Removed theme-specific icon margin selectors (moved to base); passed renamed variable to base mixin
packages/devextreme-scss/scss/widgets/generic/scheduler/_sizes.scss	Renamed variable from $generic-scheduler-appointment-popup-description-icon-margin-top to $generic-scheduler-appointment-popup-icon-margin-top across all size variants
packages/devextreme-scss/scss/widgets/generic/scheduler/_index.scss	Removed theme-specific icon margin selectors (moved to base); passed renamed variable to base mixin
packages/devextreme-scss/scss/widgets/fluent/scheduler/_sizes.scss	Renamed variable from $fluent-scheduler-appointment-popup-description-icon-margin-top to $fluent-scheduler-appointment-popup-icon-margin-top across all size variants
packages/devextreme-scss/scss/widgets/fluent/scheduler/_index.scss	Removed theme-specific icon margin selectors (moved to base); passed renamed variable to base mixin
packages/devextreme-scss/scss/widgets/base/scheduler/_index.scss	Added general icon margin-top rule with exceptions for date-range and recurrence-end groups; improved selector specificity with .dx-item-content > to correctly target box items
e2e/testcafe-devextreme/tests/scheduler/common/appointmentForm/form.visual.ts	Added visual test for appointment form with multiple resource selection to verify icon alignment with TagBox editors