E2 tick quota exceeds while the game is paused

[gglhkjsadhvl]

Describe the bug

When you go into the steam overlay (or pause the game) ops keeps adding up and it results with tick quota exceeded.

How to reproduce the bug

Write any code that constantly uses ops and pause the game. This will reproduce the bug.
Note that this doesn't happen instantly, consider making something that uses a lot of ops and wait a couple of seconds or minutes
Ex.:
event tick() { for (I=1,500){ A=1 } }

[gglhkjsadhvl]

githubthingy.mp4

[Astralcircle]

This should actually be fixed in the base game instead of E2, just like with #2825

This can be fixed by replacing the Think hook with Tick, but this changes the logic so that timers are now called before the tick event, which can break some chips.

Related GMOD issue:
Facepunch/garrysmod-issues#6853