New: Replace react-tether with react-popper (#789)

frontend/src/Components/Form/AutoSuggestInput.css

@@ -0,0 +1,49 @@
+.input {
+  composes: input from '~Components/Form/Input.css';
+}
+
+.hasError {
+  composes: hasError from '~Components/Form/Input.css';
+}
+
+.hasWarning {
+  composes: hasWarning from '~Components/Form/Input.css';
+}
+
+.inputContainer {
+  flex-grow: 1;
+}
+
+.suggestionsContainer {
+  @add-mixin scrollbar;
+  @add-mixin scrollbarTrack;
+  @add-mixin scrollbarThumb;
+}
+
+.suggestionsContainerOpen {
+  z-index: $popperZIndex;
+
+  .suggestionsContainer {
+    overflow-y: auto;
+    max-height: 200px;
+    width: 100%;
+    border: 1px solid $inputBorderColor;
+    border-radius: 4px;
+    background-color: $white;
+    box-shadow: inset 0 1px 1px $inputBoxShadowColor;
+  }
+}
+
+.suggestionsList {
+  margin: 5px 0;
+  padding-left: 0;
+  list-style-type: none;
+}
+
+.suggestion {
+  padding: 0 16px;
+}
+
+.suggestionHighlighted {
+  background-color: $menuItemHoverBackgroundColor;
+}