replace markdown-it-katex with markdown-it-texmath, this makes using $ much better (#1116)

ElectronClient/app/package.json

@@ -103,7 +103,7 @@
     "lodash": "^4.17.10",
     "mark.js": "^8.11.1",
     "markdown-it": "^8.4.1",
-    "markdown-it-katex": "^2.0.3",
+    "markdown-it-texmath": "^0.5.3",
     "md5": "^2.2.1",
     "mermaid": "^8.0.0-rc.8",
     "mime": "^2.3.1",

ReactNativeClient/lib/MdToHtml.js

@@ -467,9 +467,8 @@ class MdToHtml {
 		// This is currently used only so that the $expression$ and $$\nexpression\n$$ blocks are translated
 		// to math_inline and math_block blocks. These blocks are then processed directly with the Katex
 		// library.  It is better this way as then it is possible to conditionally load the CSS required by
-		// Katex and use an up-to-date version of Katex (as of 2018, the plugin is still using 0.6, which is
-		// buggy instead of 0.9).
-		md.use(require('markdown-it-katex'));
+		// Katex and handle rendering of katex ourselves (this one is prone to be buggy).
+		md.use(require('markdown-it-texmath'));
 
 		// Hack to make checkboxes clickable. Ideally, checkboxes should be parsed properly in
 		// renderTokens_(), but for now this hack works. Marking it with HORRIBLE_HACK so

ReactNativeClient/package-lock.json

@@ -5126,28 +5126,10 @@
         "uc.micro": "^1.0.3"
       }
     },
-    "markdown-it-katex": {
-      "version": "2.0.3",
-      "resolved": "https://registry.npmjs.org/markdown-it-katex/-/markdown-it-katex-2.0.3.tgz",
-      "integrity": "sha1-17hqGuoLnWSW+rTnkZoY/e9YnDk=",
-      "requires": {
-        "katex": "^0.6.0"
-      },
-      "dependencies": {
-        "katex": {
-          "version": "0.6.0",
-          "resolved": "https://registry.npmjs.org/katex/-/katex-0.6.0.tgz",
-          "integrity": "sha1-EkGOCRIcBckgQbazuftrqyE8tvM=",
-          "requires": {
-            "match-at": "^0.1.0"
-          }
-        }
-      }
-    },
-    "match-at": {
-      "version": "0.1.1",
-      "resolved": "https://registry.npmjs.org/match-at/-/match-at-0.1.1.tgz",
-      "integrity": "sha512-h4Yd392z9mST+dzc+yjuybOGFNOZjmXIPKWjxBd1Bb23r4SmDOsk2NYCU2BMUBGbSpZqwVsZYNq26QS3xfaT3Q=="
+    "markdown-it-texmath": {
+      "version": "0.5.3",
+      "resolved": "https://registry.npmjs.org/markdown-it-texmath/-/markdown-it-texmath-0.5.3.tgz",
+      "integrity": "sha512-F7uGF7gM1fgTinPeRZDeUK3aA4f9TPWtCcAOEKvIfuh8XNlBAF29U1XuQL9jS+yYUL+DF2ZUSjfqpNuyQBN9Iw=="
     },
     "md5": {
       "version": "2.2.1",
@@ -5306,7 +5288,7 @@
         },
         "load-json-file": {
           "version": "2.0.0",
-          "resolved": "http://registry.npmjs.org/load-json-file/-/load-json-file-2.0.0.tgz",
+          "resolved": "https://registry.npmjs.org/load-json-file/-/load-json-file-2.0.0.tgz",
           "integrity": "sha1-eUfkIUmvgNaWy/eXvKq8/h/inKg=",
           "requires": {
             "graceful-fs": "^4.1.2",
@@ -6574,7 +6556,7 @@
         },
         "load-json-file": {
           "version": "2.0.0",
-          "resolved": "http://registry.npmjs.org/load-json-file/-/load-json-file-2.0.0.tgz",
+          "resolved": "https://registry.npmjs.org/load-json-file/-/load-json-file-2.0.0.tgz",
           "integrity": "sha1-eUfkIUmvgNaWy/eXvKq8/h/inKg=",
           "requires": {
             "graceful-fs": "^4.1.2",
@@ -8967,7 +8949,7 @@
       "dependencies": {
         "uuid": {
           "version": "3.0.1",
-          "resolved": "http://registry.npmjs.org/uuid/-/uuid-3.0.1.tgz",
+          "resolved": "https://registry.npmjs.org/uuid/-/uuid-3.0.1.tgz",
           "integrity": "sha1-ZUS7ot/ajBzxfmKaOjBeK7H+5sE="
         }
       }

ReactNativeClient/package.json

@@ -18,7 +18,7 @@
     "html-entities": "^1.2.1",
     "katex": "^0.10.0",
     "markdown-it": "^8.4.0",
-    "markdown-it-katex": "^2.0.3",
+    "markdown-it-texmath": "^0.5.3",
     "md5": "^2.2.1",
     "moment": "^2.18.1",
     "prop-types": "^15.6.0",