docs: add a tip about a separate mod folder

Also improve the wording of instructions for bug reports

.github/ISSUE_TEMPLATE/generic-bug-report.md

@@ -10,9 +10,9 @@ assignees: ''
 - Make sure that you are using the latest available version of YAFC.
 - Specify the YAFC version on which the bug happened.
 
-- Check the issues of [this](https://github.com/have-fun-was-taken/yafc-ce/issues) and the [original](https://github.com/ShadowTheAge/yafc/issues) repository for at least 5 minutes to see if your problem is not a duplicate of another open or closed issue.
-- Give as much relevant info as possible. The better you describe the issue, the bigger the chance someone fixes it. 
-- If the bug is about mods, attach a new-game save-file so we can sync the mods with yours.
+- Please check the issues of [Yafc-ce](https://github.com/have-fun-was-taken/yafc-ce/issues) and the [original Yafc](https://github.com/ShadowTheAge/yafc/issues) to see if your problem is not a duplicate of another open or closed issue.
+- Give as much relevant info as possible. The better you describe the issue, the bigger the chance that someone fixes it.
+- If the bug is about mods, then attach a new-game save-file so we can sync the mods with yours.
 - If the bug is about your .yafc project, such as errors in calculations, then attach your .yafc file.
 - Describe the steps to reproduce the issue, the expected result, and the actual result.
-- If possible, please provide a minimal example to reproduce the issue. For example, check if the bug can be reproduced on a fresh project instead of the usual one. Try to use as few mods as possible.
+- If possible, please provide a minimal example to reproduce the issue. Check if the bug can be reproduced on a fresh Yafc project, and try to use as few mods as possible. For mods selection, you can copy the mods folder, select it in Yafc, and edit the file mod-list.json to enable or disable mods.

Yafc/Data/Tips.txt

@@ -14,3 +14,4 @@ Tip: Specify <number>b to produce that many belts worth of product, for the belt
 Tip: Specify <number>k to multiply the production by 1000. Other SI prefixes work too! (put the prefix before 'b' or '/h')
 Tip: You can enable the dark mode by clicking on the light-bulb icon on the welcome screen.
 Tip: You can switch between tabs using Ctrl+PgUp or Down and reorder them using Ctrl+Shift+PgUp or Down.
+Tip: You can make Yafc load faster by copying the mods folder and disabling the mods that don't affect calculations in mod-list.json.