Fix #19 - prevent thread content from rendering in html in main view

[sumaiyamannan]

Hi

Fixes Rendering image attachments from discussions in main view causes performance issues. #19

[danmarsden]

@fabianbatioja @danielcifuentesopen @TheBryanOpen228 - any chance of getting this PR reviewed and included in the main release? - it's been problematic for a few of our clients and this has been sitting in the PR list for a while - we've just rebased it to make it easier but please let us know if you have any feedback and we can try to adjust the patch further if required.

thanks!

[danmarsden]

@jgg9026 any chance of getting someone in your team to take a look at this? - we're happy to make further changes if needed!

[jgg9026]

Hi, I'll take a look

[aspark21]

@Julian-Tovar thanks for merging all of the compatibility fixes for 4.4 and 4.5

Would be great if you could also look at merging this one too, which as described in
#19 addresses a major performance bug where the images of all of the threads get loaded on the forum overview page.

We can then finally come back to using the upstream version of this plugin