remove color inherit to help w/ light/dark switching

src/components/WindowTopBar.js

@@ -32,7 +32,6 @@ export class WindowTopBar extends Component {
         <Toolbar disableGutters className={classNames(classes.windowTopBarStyle, focused ? classes.focused : null, ns('window-top-bar'))} variant="dense">
           <MiradorMenuButton
             aria-label={t('toggleWindowSideBar')}
-            color="inherit"
             onClick={toggleWindowSideBar}
           >
             <MenuIcon />
@@ -46,7 +45,6 @@ export class WindowTopBar extends Component {
             <MiradorMenuButton
               aria-label={(maximized ? t('minimizeWindow') : t('maximizeWindow'))}
               className={ns('window-maximize')}
-              color="inherit"
               onClick={(maximized ? minimizeWindow : maximizeWindow)}
             >
               {(maximized ? <FullscreenExitIcon /> : <FullscreenIcon />)}
@@ -56,7 +54,6 @@ export class WindowTopBar extends Component {
             <MiradorMenuButton
               aria-label={t('closeWindow')}
               className={ns('window-close')}
-              color="inherit"
               onClick={removeWindow}
             >
               <CloseIcon />

src/components/WindowTopMenuButton.js

@@ -52,7 +52,6 @@ export class WindowTopMenuButton extends Component {
           aria-label={t('windowMenu')}
           aria-owns={anchorEl ? `window-menu_${windowId}` : undefined}
           className={anchorEl ? classes.ctrlBtnSelected : null}
-          color="inherit"
           onClick={this.handleMenuClick}
         >
           <MoreVertIcon />

src/components/WorkspaceAdd.js

@@ -96,7 +96,6 @@ export class WorkspaceAdd extends React.Component {
                 <MiradorMenuButton
                   aria-label={t('closeAddResourceMenu')}
                   className={classes.menuButton}
-                  color="inherit"
                 >
                   <ExpandMoreIcon />
                 </MiradorMenuButton>