Allow timecode to be used as timestamp in Share Modal

[thecashewtrader]

Currently, the share modal only allows timestamp to be in seconds. This PR allows the timestamp to be in seconds as well as in HH:MM:SS format.

Some points to note:

• Currently, YouTube has a bit confusing of a policy about maximum video duration, as stated in #1672. Therefore, this PR parses the timecode string manually instead of using something like Intl.DateFormat.
• Currently, in the HH:MM:SS format, the seconds/minutes/hours value can be more than expected, which is handled without errors. For example: 10:61 will return &t=661. This can be changed if intended, but imo it's quite convenient.
• It would be required to update the actions.time_code translations to reflect the new changes.

[FireMasterK]

I fail to understand what's wrong with the current mechanism, is the number overflowing? (I highly doubt that's the case)

[thecashewtrader]

I fail to understand what's wrong with the current mechanism, is the number overflowing? (I highly doubt that's the case)

imo it's more convenient to put in a HH:MM:SS string than a raw number, as you don't have to do the calculation yourself, especially if it's a long video.