bd improvements

src/bd.less

@@ -3,6 +3,39 @@
 div[class^="bd-"]
 { &:extend(.round); }
 
+button.bd-addon-button {
+  margin: 4px;
+}
+
+div.floating-window {
+  &:extend(.round);
+  box-shadow: none;
+  padding: 0 !important;
+  max-width:  100% !important;
+  max-height: 100% !important;
+  min-width:  256px !important;
+  min-height: 32px !important;
+}
+
+div.floating-window-buttons .button {
+  & > svg {
+    padding: 2px;
+    border-radius: 50%;
+  }
+  &:hover {
+    background-color: unset;
+    color: var(--background-tertiary);
+  }
+
+  &.maximize-button:hover > svg {
+    background-color: #3ba55d;
+  }
+
+  &.close-button:hover > svg {
+    background-color: #ed4245;
+  }
+}
+
 div.bd-search-wrapper,
 div.bd-changelog-button {
   align-self: center;