chore: migrate from Select to Combobox

[g3john]

Summary

Select has been deprecated in favour of Combobox

Addresses #1227

Changes

• Replaced all uses of Select with Combobox
• Added Fields for labels
• Added combobox test util functions
• UI changes:

[github-actions]

Script size changes

Name	+/-	Main	This PR	Outcome
[263.js]	+4.24%	1,646.45 kB	1,716.20 kB	✅
[234.js]	New file	-	804.95 kB	✅
[datasource/module.js]	+1.90%	24.56 kB	25.03 kB	✅
[692.js]	-3.66%	20.57 kB	19.82 kB	✅
[663.js]	=	5.84 kB	5.84 kB	✅
[module.js]	+0.08%	4.85 kB	4.86 kB	✅
[88.js]	Deleted file	984.46 kB	-

Totals

Name	+/-	Main	This PR	Outcome
[Scripts]	-4.10%	2,686.74 kB	2,576.70 kB	✅
[Non-script Assets]	+0.02%	2,671.09 kB	2,671.65 kB	✅
[All]	-2.04%	5,357.82 kB	5,248.34 kB	✅

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