Flag and banner templates + fixes (#16513)

* deleted bugged changelog and added own

* flag dmi

* mishap with elyra fixed

* Revert "mishap with elyra fixed"

This reverts commit 1ff190442e.

* Revert "deleted bugged changelog and added own"

This reverts commit 3690ebb1d1.

* flag push plus changelog fix

* desperate measures

* please work

* Update html/changelogs/niennab-16513.yml

Co-authored-by: SleepyGemmy <99297919+SleepyGemmy@users.noreply.github.com>

---------

Co-authored-by: Matt Atlas <mattiathebest2000@hotmail.it>
Co-authored-by: SleepyGemmy <99297919+SleepyGemmy@users.noreply.github.com>

html/changelogs/niennab-16513.yml

@@ -0,0 +1,42 @@
+################################
+# Example Changelog File
+#
+# Note: This file, and files beginning with ".", and files that don't end in ".yml" will not be read. If you change this file, you will look really dumb.
+#
+# Your changelog will be merged with a master changelog. (New stuff added only, and only on the date entry for the day it was merged.)
+# When it is, any changes listed below will disappear.
+#
+# Valid Prefixes:
+#   bugfix
+#   wip (For works in progress)
+#   tweak
+#   soundadd
+#   sounddel
+#   rscadd (general adding of nice things)
+#   rscdel (general deleting of nice things)
+#   imageadd
+#   imagedel
+#   maptweak
+#   spellcheck (typo fixes)
+#   experiment
+#   balance
+#   admin
+#   backend
+#   security
+#   refactor
+#################################
+
+# Your name.
+author: Niennab
+
+# Optional: Remove this file after generating master changelog.  Useful for PR changelogs that won't get used again.
+delete-after: True
+
+# Any changes you've made.  See valid prefix list above.
+# INDENT WITH TWO SPACES.  NOT TABS.  SPACES.
+# SCREW THIS UP AND IT WON'T WORK.
+# Also, all entries are changed into a single [] after a master changelog generation. Just remove the brackets when you add new entries.
+# Please surround your changes in  double quotes ("), as certain characters otherwise screws up compiling. The quotes will not show up in the changelog.
+changes:
+  - rscadd: "Added template flags and banners for those looking to add flags to the codebase."
+  - tweak: "Fixed a few stray pixels, sizes, and patterns on a number of flags and banners."