Issue #2577407 by vulcanr, jhodgdon, Sagar Ramgade, snehi, brahmjeet789, Manjit.Singh, Tony-Mac, ressa, xjm, cilefen, sajosh, ifrik, Charles Belov, Bojhan, David_Rothstein, Gábor Hojtsy, tkoleary, longwave, NickDickinsonWilde, nishantkumar155, shell_cm, greta_drupal, YesCT: Action of uploading module/theme files should consistently be called "Add", not "Install"