[UI] Classroom creation

[Ewa032]

• https://github.com/WomenPlusPlus/deploy-impact-22-wikimini-b/issues/43
• Designs: https://www.figma.com/file/GyaAuxiHncjTtKnC7duPUv/Wikimini?node-id=245%3A2080

[Ewa032]

@liyaaah

Should the Add button be aligned?

Email address title not centered

Why are the buttons so far away from each other + not at the same level

[liyaaah]

Updated the design