Fixed UI issues: non-resizable window, grey background, white buttons (#1)#2

csanthoshkumarraju wants to merge 1 commit intoPariCoderDeveloper:mainPariCoderDeveloper/Calculator:mainfrom

csanthoshkumarraju:UI-issues-fix-resizable-window-grey-background-buttonscsanthoshkumarraju/Calculator_Open_Source:UI-issues-fix-resizable-window-grey-background-buttonsCopy head branch name to clipboard