[Glitch] Rename JSX files with proper .jsx extension

Port 44a7d87cb1 to glitch-soc

Signed-off-by: Claire <claire.github-309c@sitedethib.com>

app/javascript/flavours/glitch/packs/share.jsx

@@ -0,0 +1,23 @@
+import 'packs/public-path';
+import loadPolyfills from 'flavours/glitch/load_polyfills';
+
+function loaded() {
+  const ComposeContainer = require('flavours/glitch/containers/compose_container').default;
+  const React = require('react');
+  const ReactDOM = require('react-dom');
+  const mountNode = document.getElementById('mastodon-compose');
+
+  if (mountNode !== null) {
+    const props = JSON.parse(mountNode.getAttribute('data-props'));
+    ReactDOM.render(<ComposeContainer {...props} />, mountNode);
+  }
+}
+
+function main() {
+  const ready = require('flavours/glitch/ready').default;
+  ready(loaded);
+}
+
+loadPolyfills().then(main).catch(error => {
+  console.error(error);
+});