Ticket 4665 - Emoji Picker (#5157)

*  #4665  Added EmojiPicker

Work primarily by @broernr-de and @harrison on pre-release.mattermost.com

* Final fixes to handle custom emojis from internal review and single merge error

* ESLint fixes

* CSS changes and other code to support emoji picker in reply window

* Fix for file upload and emoji picker icon positions on post and comment.

RHS emoji picker appearing see-through at this time.

* Fix for two ESLint issues.

* covered most of feedback:
RHS emoji picker looks correct color-wise
RHS emoji picker dynamically positions against height of thread size (post + reply messages)
escape closes emoji window
search box focused on open

ESLint fixes against other files
oversized emoji preview fixes

* Adding in 'outside click' eventing to dismiss the emoji window

* Changing some formatting to fix mismatch between my local eslant rules and jenkins.

* adding alternative import method due to downstream testing errors

* yet another attempt to retain functionality and pass tests - skipping import of browser store

* fix for feedback items 5 and 7:
* move search to float on top with stylistic changes
* whitespace in the header (+1 squashed commit)
Squashed commits:
[6a26d32] changes that address items
1, 2, 6, 8, and 9 of latest feedback

* Fix for attachment preview location on mobile

* Fix for latest rounds of feedback

* fixing eslint issue

* making emojipicker sprite based, fixing alignments

* Fix for emoji quality, fixing some behavior (hover background and cursor settings)
undoing config changes

* Preview feature for emojis

* Adjustments to config file, and changing layout/design of attachment and emoji icon.

* manual revert from master branch for config.json

* reverting paperclip and fixing alignments.  Additionally fixing inadvertent display of picker on mobile.

* CSS changes to try to fix the hover behavior - currently working for emoji picker (when enabled), but hover for attachment isn't working

* Made suggested changes by jwilander except for jQuery removal

* Adding hover for both icons

* removal of some usages of jQuery

* Fix for two layout issues on IE11/Edge

* UI improvements for emoji picker

* Fix for many minor display issues

* fix for additional appearance items

* fix to two minor UI items

* A little extra padding for IE11

* fix for IE11 scroll issue, and removing align attribute on img tag which was throwing js error

* fixes some display issues on firefox

* fix for uneven sides of emojis

* fix for eslint issues that I didn't introduce

* fix for missing bottom edge of RHS emojipicker.  also fixing text overlapping icons on text area (including RHS)

* Update "emoji selector" to "emoji picker"

* changes for code review
- removal of ..getDOMNode
- use sprite imagery for emoji preview
- remove lastBlurAt from state as it wasn't used

* fixes for:
- fake custom emoji preview in picker
- RHS scrollbar on preview

* fix for minor alignment of preview emoji

webapp/sass/responsive/_mobile.scss

@@ -31,6 +31,15 @@
         }
     }
 
+    .post-create__container{
+        .post-create-body {
+            .icon__postcontent_picker {
+                display:none;
+                top: -7px;
+            }
+        }
+    }
+
     .suggestion-list__content {
         max-height: 145px;
     }
@@ -1098,6 +1107,13 @@
                 padding: .5em 1em;
             }
 
+            .emoji-rhs {
+                position: relative;
+                display: none;
+                top: 1px;
+                right: -1px;
+            }
+
             .msg-typing:empty {
                 display: none;
             }

webapp/sass/responsive/_tablet.scss

@@ -19,14 +19,23 @@
             width: 300px;
         }
     }
-
+    .post-right__scroll{
+        .post-create__container{
+            .post-create-body {
+                .icon__emoji_picker {
+                    display:none;
+                    top: -7px;
+                }
+            }
+        }
+    }
     .post-create__container {
         form {
             padding: .5em 0 0;
         }
 
         .post-create-footer {
-            padding: 0 45px;
+            padding: 0 45px 0 8px;
 
             .post-error {
                 position: relative;
@@ -46,6 +55,7 @@
                 display: table-cell;
                 padding-left: 45px;
 
+
                 .sidebar--right & {
                     padding-left: 0;
                 }
@@ -54,15 +64,30 @@
             .app__content & {
                 .btn-file {
                     bottom: -2px;
-                    left: 0;
+                    left: 10px;
                     line-height: 36px;
                     padding: 0;
                     top: auto;
-                    width: 45px;
+                    width: 25px;
                 }
             }
 
-            .send-button {
+            .app__content & {
+                .icon {
+                    position: relative;
+                    top: 3px;
+
+                }
+            }
+
+            .icon__emoji_picker {
+                position: relative;
+                display: none;
+                top: 1px;
+                right: -1px;
+            }
+
+                    .send-button {
                 display: table-cell;
             }
         }