Fix settings titles in dark mode (#15174)

Fix settings icon not showing in some browsers
Fix fping configuration formatting issue
Add brief docs on formatting settings links

doc/Developing/Creating-Documentation.md

@@ -57,6 +57,7 @@ This means you can use:
 - `#` Can be used for main headings which translates to a `<h1>` tag,
   increasing the `#`'s will increase the hX tags.
 - `###` Can be used for sub-headings which will appear in the TOC to the left.
+- Settings should be prefixed with `!!! setting "<webui setting path>"`
 
 [Markdown CheatSheet Link](https://github.com/adam-p/markdown-here/wiki/Markdown-Cheatsheet)
 

doc/Support/Configuration.md

@@ -193,8 +193,8 @@ configuring your install to record data more frequently.
 
 !!! setting "external/binaries"
     ```bash
-lnms config:set fping /usr/bin/fping
-lnms config:set fping6 fping6
+    lnms config:set fping /usr/bin/fping
+    lnms config:set fping6 fping6
     ```
 
 !!! setting "poller/ping"

doc/librenms.css

@@ -37,7 +37,7 @@
 
 /* Setting admonition */
 :root {
-    --md-admonition-icon--setting: url('data:image/svg+xml;charset=utf-8, <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512"><!-- Font Awesome Free 5.15.4 by @fontawesome - https://fontawesome.com License - https://fontawesome.com/license/free (Icons: CC BY 4.0, Fonts: SIL OFL 1.1, Code: MIT License) --><path d="M487.4 315.7l-42.6-24.6c4.3-23.2 4.3-47 0-70.2l42.6-24.6c4.9-2.8 7.1-8.6 5.5-14-11.1-35.6-30-67.8-54.7-94.6-3.8-4.1-10-5.1-14.8-2.3L380.8 110c-17.9-15.4-38.5-27.3-60.8-35.1V25.8c0-5.6-3.9-10.5-9.4-11.7-36.7-8.2-74.3-7.8-109.2 0-5.5 1.2-9.4 6.1-9.4 11.7V75c-22.2 7.9-42.8 19.8-60.8 35.1L88.7 85.5c-4.9-2.8-11-1.9-14.8 2.3-24.7 26.7-43.6 58.9-54.7 94.6-1.7 5.4.6 11.2 5.5 14L67.3 221c-4.3 23.2-4.3 47 0 70.2l-42.6 24.6c-4.9 2.8-7.1 8.6-5.5 14 11.1 35.6 30 67.8 54.7 94.6 3.8 4.1 10 5.1 14.8 2.3l42.6-24.6c17.9 15.4 38.5 27.3 60.8 35.1v49.2c0 5.6 3.9 10.5 9.4 11.7 36.7 8.2 74.3 7.8 109.2 0 5.5-1.2 9.4-6.1 9.4-11.7v-49.2c22.2-7.9 42.8-19.8 60.8-35.1l42.6 24.6c4.9 2.8 11 1.9 14.8-2.3 24.7-26.7 43.6-58.9 54.7-94.6 1.5-5.5-.7-11.3-5.6-14.1zM256 336c-44.1 0-80-35.9-80-80s35.9-80 80-80 80 35.9 80 80-35.9 80-80 80z"/></svg>')
+    --md-admonition-icon--setting: url('data:image/svg+xml;base64,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')
 }
 
 .md-typeset .admonition.setting,
@@ -72,7 +72,7 @@
     cursor: pointer;
 }
 a.setting-link, a.setting-link:visited {
-    color: #000;
+    color: var(--md-admonition-fg-color);
 }
 
 a.setting-link:focus, a.setting-link:hover {