Created custom css style upload (#4039)

* Created custom css style upload

* Created theme config that contain related css for every thame

* Revert "Created theme config that contain related css for every thame"

This reverts commit 1677062.

* Replaced null check with ?has_content in ftl

* Updated custom-css-path id in link style

Author: milospp

webapp/src/main/webapp/themes/nemo/templates/head.ftl

@@ -38,4 +38,8 @@
 an individual profile page. -->
 ${headContent!}
 
+<#if customCssPath?has_content >
+    <link id="custom-css-path" rel="stylesheet" href="${customCssPath}">
+</#if>
+
 <link rel="shortcut icon" type="image/x-icon" href="${urls.base}/favicon.ico">

webapp/src/main/webapp/themes/tenderfoot/templates/page/partials/head.ftl

@@ -31,4 +31,8 @@
 an individual profile page. -->
 ${headContent!}
 
+<#if customCssPath?has_content >
+    <link id="custom-css-path" rel="stylesheet" href="${customCssPath}">
+</#if>
+
 <link rel="shortcut icon" type="image/x-icon" href="${urls.base}/favicon.ico">

webapp/src/main/webapp/themes/wilma/templates/head.ftl

@@ -39,4 +39,8 @@ ${headScripts.add('<script type="text/javascript" src="${urls.base}/js/tooltip/t
 an individual profile page. -->
 ${headContent!}
 
+<#if customCssPath?has_content >
+    <link id="custom-css-path" rel="stylesheet" href="${customCssPath}">
+</#if>
+
 <link rel="shortcut icon" type="image/x-icon" href="${urls.base}/favicon.ico">