docs: A set of cosmetical changes in documentation

- limit page width to 1100px and adjust frontpage tiles
- make glossary flat structure (remove sub sections)
- add favicon
- disable "View page source" link
- disable Prev,Next buttons
- disable "Built with Sphinx ..." in page footer
- add captions to some pages to shrink names in TOC

Signed-off-by: Anton Komlev <anton.komlev@arm.com>
Change-Id: Ib6844b118c25b4437d7f11014112533fd8d5547b
diff --git a/docs/index.rst b/docs/index.rst
index c941e2a..d8e93a7 100644
--- a/docs/index.rst
+++ b/docs/index.rst
@@ -92,7 +92,7 @@
     API Reference <https://ci.trustedfirmware.org/view/TF-M/job/tf-m-build-docs-nightly/lastSuccessfulBuild/artifact/trusted-firmware-m/build/docs/reference_manual/html/index.html>
     Security Center <https://developer.trustedfirmware.org/w/collaboration/security_center>
     Platform Security Architecture <https://developer.arm.com/architectures/security-architectures/platform-security-architecture>
-    glossary
+    Glossary <glossary>
 
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