Add meetings - Text does not turn red when meetings clash

[nus-se-script]

As shown in the image above, when the timings are at the boundary (meaning one ends when one starts), only one of the meeting timings turn red but not the other

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_{[original: nus-cs2103-AY2425S1/pe-interim#3216] [original labels: severity.Low type.FunctionalityBug]}

[KennyLewi]

Team's Response

We tried to replicate the example shown above, but both of the meeting timings are shown as green. The example shown is likely red as there are likely other meetings in the tester's list that clashes with the first "Closing Meeting" on the list. Moreover, timings that clashes at the boundary should not be considered as overlapping (e.g. there can be meetups from 2pm - 3pm and 3pm - 4pm, and they are not considered clashing).

Duplicate status (if any):

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