F module doc

A few changes to the documentation for creating new webui modules.

src/doc/extension/module.md

@@ -51,7 +51,7 @@ $(document).ready(function() {
     // use a variable starting with `BUILD_MODULE_` to enable your module
     // the build variable has to be enabled in the `build.properties.d/` directory.
     // Otherwise the module will not be activated.
-    if ("${BUILD_MODULE_EXT_BOTTOM_LINE}" === "ENABLED") {
+    if ("${BUILD_MODULE_EXT_FLIGHT_PREVIEW}" === "ENABLED") {
         caosdb_modules.register(ext_flight_preview);
     }
 });
@@ -88,4 +88,17 @@ may append all your module files in the desired order to the
 
     MODULE_DEPENDENCIES+=(libA.js libB.js ext_flight_preview.js)
 
-In this example, `libA.js`, `libB.js` and `ext_flight_preview.js` are custom modules developed for this particular LinkAhead webui instance.
+In this example, `libA.js`, `libB.js` and `ext_flight_preview.js` are custom modules developed for this particular CaosDB webui instance.
+
+Briefly describe the changes you made to the whole repository in the file called `CHANGELOD.md` in caosdb-webui.
+
+## Create a merge request
+
+Commit your changes to the repository to a new branch called `f-<custom name>`. `f-` is the shorthand for feature-branch and your custom name should be short, but descriptive, e.g. `f-flight-preview` in this case.
+
+Push your branch upstream using e.g.:
+`git push --set-upstream origin f-flight-preview`
+
+Login to gitlab and navigate to the project caosdb-webui.
+
+There should be a button titled `Create Merge Request`.
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