Adjust the ChangesRequireFullSyncDialog

[RisingOrange]

Fixes some issues with the ChangesRequireFullSyncDialog identified during QA: https://ankihub.atlassian.net/jira/software/c/projects/BUILD/boards/1?selectedIssue=BUILD-1041

Related issues

https://ankihub.atlassian.net/jira/software/c/projects/BUILD/boards/1?selectedIssue=BUILD-1041

Proposed changes

• Fix checkbox not working on some Qt versions
• Use other arrow icons
• Adjust "Note type updates" text color and increase font size
• Open the dialog using show instead of open to change how the dialog looks on MacOs

How to reproduce

Run this in Anki's debug console:

import aqt
from ankihub.gui.changes_require_full_sync_dialog import ChangesRequireFullSyncDialog, ChangesRequireFullSyncError

mid = aqt.mw.col.models.all_names_and_ids()[0].id
error = ChangesRequireFullSyncError(set([mid]))
dialog = ChangesRequireFullSyncDialog(error, parent=aqt.mw)
dialog.show()

Screenshots