Control keybindings (#489)

* fixed inline settings textedit and added datepicker keybindings

* added dropdown keybindings

* added observable to make sure that keybindings aren't double registered

* added enter and escape keybindings for datepicker

* dropdown closure fix

assets/default-keybindings.json

@@ -23,6 +23,54 @@
       "command": "generic:deleteItem",
       "keys": ["Backspace", "Delete"]
     },
+    {
+      "command": "generic:space",
+      "keys": ["Space"]
+    },
+    {
+      "command": "generic:tab",
+      "keys": ["Tab"]
+    },
+    {
+      "command": "generic:numpad-0",
+      "keys": ["0"]
+    },
+    {
+      "command": "generic:numpad-1",
+      "keys": ["1"]
+    },
+    {
+      "command": "generic:numpad-2",
+      "keys": ["2"]
+    },
+    {
+      "command": "generic:numpad-3",
+      "keys": ["3"]
+    },
+    {
+      "command": "generic:numpad-4",
+      "keys": ["4"]
+    },
+    {
+      "command": "generic:numpad-5",
+      "keys": ["5"]
+    },
+    {
+      "command": "generic:numpad-6",
+      "keys": ["6"]
+    },
+    {
+      "command": "generic:numpad-7",
+      "keys": ["7"]
+    },
+    {
+      "command": "generic:numpad-8",
+      "keys": ["8"]
+    },
+    {
+      "command": "generic:numpad-9",
+      "keys": ["9"]
+    },
     {
       "command": "generic:selectAbove",
       "keys": ["ArrowUp"]
@@ -31,6 +79,14 @@
       "command": "generic:selectBelow",
       "keys": ["ArrowDown"]
     },
+    {
+      "command": "generic:selectLeft",
+      "keys": ["ArrowLeft"]
+    },
+    {
+      "command": "generic:selectRight",
+      "keys": ["ArrowRight"]
+    },
     {
       "command": "generic:selectPageAbove",
       "keys": ["PageUp"]