New: Truncate button text

Fixes #2352

(cherry picked from commit 093ee5b88db0470426f6132e66a5893e5cf89bab)

frontend/src/Components/Page/Toolbar/PageToolbarButton.css

@@ -22,11 +22,14 @@
   display: flex;
   align-items: center;
   justify-content: center;
+  overflow: hidden;
   height: 24px;
 }
 
 .label {
   padding: 0 3px;
+  max-width: 100%;
+  max-height: 100%;
   color: var(--toolbarLabelColor);
   font-size: $extraSmallFontSize;
   line-height: calc($extraSmallFontSize + 1px);

frontend/src/Components/Page/Toolbar/PageToolbarButton.js

@@ -23,6 +23,7 @@ function PageToolbarButton(props) {
         isDisabled && styles.isDisabled
       )}
       isDisabled={isDisabled || isSpinning}
+      title={label}
       {...otherProps}
     >
       <Icon