Improve the Icon Chooser window to eliminate or improve on the current display limit of 145 icons

[jimbarrsc]

Is your feature request related to a problem? Please describe.
There appears to be a hard limit of 145 displayed icons in the icon chooser window meaning you can't browse all available icons.

Describe the solution you'd like
When I right-click and select "Change Icon" on an item, a chooser window pops up. It displays the 5 recently used icons and a grid of 5 x 29 (145) available icons. Most of the available icon packs have more than 145 icons, so there appears to be no way to browse through all icons. I would like to be able to browse all available icons.

Describe alternatives you've considered

1. Increase the number from 145 to a more reasonable larger limit.
2. Remove the limit altogether. I realize that this could impact performance.
3. Provide an Option for the user to define the number of displayed icons.
4. Provide a more comprehensive icon browser to view and select from all available icons.