Fix white background on some demos (#47)

* Make background transparent on HTML5

* Fix gamepad demo

* remove last paragraph

it has bad grammar, and the idea that no one would want autoWidth and fixed height doesn't account for multiline text

---------

Co-authored-by: George Kurelic <[email protected]>

Author: ACrazyTown

_proofs/text/textfield-width-and-height.md

@@ -29,12 +29,3 @@ text.wordWrap = false; // must be explicitly set to `false`
 // or
 text.fieldWidth = text.fieldHeight = -1;
 ```
-
-**Note**: "fixed height - auto width" has no sence, it behaves the same way
-as the default autosized text:
-
-```haxe
-// no sense, same as default autosize behavior
-text.fieldWidth = -1;
-text.fieldHeight = 50;
-```

demos/input/gamepad/Project.xml

@@ -7,6 +7,7 @@
 	<window width="320" height="240" fps="60" hardware="true" vsync="false" />
 	<window if="desktop" orientation="landscape" fullscreen="false" resizable="true" />
 	<window if="mobile" orientation="landscape" fullscreen="true" width="0" height="0" />
+	<window background="null" if="html5" />
 	<set name="BUILD_DIR" value="export" />
 	<source path="source" />
 	<source path="../../shared/" />
@@ -20,4 +21,4 @@
 	<!-- <haxedef name="FLX_NO_GAMEPAD" />-->
 	<haxedef name="FLX_NO_FOCUS_LOST_SCREEN" />
 	<haxedef name="FLX_NO_DEBUG" unless="debug" />
-</project>
+</project>

demos/text/textfield-width-and-height/Project.xml

@@ -7,6 +7,7 @@
 	<window width="320" height="240" fps="60" hardware="true" vsync="false" />
 	<window if="desktop" orientation="landscape" fullscreen="false" resizable="true" />
 	<window if="mobile" orientation="landscape" fullscreen="true" width="0" height="0" />
+	<window background="null" if="html5" />
 	<set name="BUILD_DIR" value="export" />
 	<source path="source" />
 	<source path="../../shared/" />