Fix time display

[PhysSong]

It fixes #2112, also fixes #3701 (comment).
If #3701 (comment) is fixed by @michaelgregorius(or other person), I'll drop the fix for #3701 (comment) and modify my PR.

Edit: @michaelgregorius have done fix by bcdb5ec, so commif 8ffebbb have been dropped.

[michaelgregorius]

@PhysSong My commit to fix #3701 has introduced a conflict but it should hopefully be possible to resolve by dropping 8ffebbb as you have already mentioned. The difference to your fix is that I have introduced a second methods so that the version with tick_t can still be used.

[PhysSong]

@michaelgregorius Okay. I'll drop that commit and fix my PR.

[PhysSong]

I found that m_elapsedTicks and m_elapsedTacts are no longer used. Could I remove them?

[michaelgregorius]

If they are no longer used I'd say we should remove them.

[tresf]

Tested, works.