Username can be edited by double clicking on text, added global user profile menu action in user info widget

This reverts commit 74e32dd9.

    - remove unnecessary field sender in userprofile.qml
    - cover user facing string with qsTr to get picked by translations
    - add spacing and fix theming issue
    - increase and add color to username
    - change back to QVector from QLinkedList cause I have mistaken
    better time complexity to give better benchmark

red

recieving start or request