Solve query language Bugs #74

[karimali03]

I have made some edits to make query languages works properly

Const & Time

• The problem here is that const and time wire created but not saved so when trying to find it it gives error so I made a set to store these Wire objects
• there was a tiny problem in defenition of time function so I edit it

  Prev & Next

• the problem here is the fist child of "prev" or "next" is the number not the wire
• I edit it to create the wire from the 2nd child
• I edited the function of prev and next to work properly