fixed some images (#9237)

docs/sources/features/datasources/graphite.md

@@ -41,7 +41,7 @@ Proxy access means that the Grafana backend will proxy all requests from the bro
 Click the ``Select metric`` link to start navigating the metric space. One you start you can continue using the mouse
 or keyboard arrow keys. You can select a wildcard and still continue.
 
-{{< docs-imagebox img="/img/docs/v45/graphite_query1_still.png" class="docs-image--center"
+{{< docs-imagebox img="/img/docs/v45/graphite_query1_still.png"
                   animated-gif="/img/docs/v45/graphite_query1.gif" >}}
 
 
@@ -52,7 +52,7 @@ a function is selected it will be added and your focus will be in the text box o
 a parameter just click on it and it will turn into a text box. To delete a function click the function name followed
 by the x icon.
 
-{{< docs-imagebox img="/img/docs/v45/graphite_query2_still.png" class="docs-image--center"
+{{< docs-imagebox img="/img/docs/v45/graphite_query2_still.png"
                   animated-gif="/img/docs/v45/graphite_query2.gif" >}}
 
 
@@ -60,7 +60,7 @@ by the x icon.
 
 Some functions like aliasByNode support an optional second argument. To add this parameter specify for example 3,-2 as the first parameter and the function editor will adapt and move the -2 to a second parameter. To remove the second optional parameter just click on it and leave it blank and the editor will remove it.
 
-{{< docs-imagebox img="/img/docs/v45/graphite_query3_still.png" class="docs-image--center"
+{{< docs-imagebox img="/img/docs/v45/graphite_query3_still.png"
                   animated-gif="/img/docs/v45/graphite_query3.gif" >}}
 
 
@@ -68,7 +68,7 @@ Some functions like aliasByNode support an optional second argument. To add this
 
 You can reference queries by the row “letter” that they’re on (similar to  Microsoft Excel). If you add a second query to a graph, you can reference the first query simply by typing in #A. This provides an easy and convenient way to build compounded queries.
 
-{{< docs-imagebox img="/img/docs/v45/graphite_nested_queries_still.png" class="docs-image--center"
+{{< docs-imagebox img="/img/docs/v45/graphite_nested_queries_still.png"
                   animated-gif="/img/docs/v45/graphite_nested_queries.gif" >}}
 
 

docs/sources/features/datasources/influxdb.md

@@ -41,7 +41,7 @@ mode is also more secure as the username & password will never reach the browser
 
 ## Query Editor
 
-{{< docs-imagebox img="/img/docs/v45/influxdb_query_still.png" class="docs-image--block docs-image--no-shadow" animated-gif="/img/docs/v45/influxdb_query.gif" >}}
+{{< docs-imagebox img="/img/docs/v45/influxdb_query_still.png" class="docs-image--no-shadow" animated-gif="/img/docs/v45/influxdb_query.gif" >}}
 
 You find the InfluxDB editor in the metrics tab in Graph or Singlestat panel's edit mode. You enter edit mode by clicking the
 panel title, then edit. The editor allows you to select metrics and tags.

docs/sources/features/datasources/mysql.md

@@ -57,7 +57,7 @@ If the `Format as` query option is set to `Table` then you can basically do any
 
 Query editor with example query:
 
-{{< docs-imagebox img="/img/docs/v45/mysql_table_query.png" class="docs-image--block" >}}
+{{< docs-imagebox img="/img/docs/v45/mysql_table_query.png" >}}
 
 The query:
 

docs/sources/features/datasources/prometheus.md

@@ -39,7 +39,7 @@ Name | Description
 
 Open a graph in edit mode by click the title > Edit (or by pressing `e` key while hovering over panel).
 
-{{< docs-imagebox img="/img/docs/v45/prometheus_query_editor_still.png" class="docs-image--center"
+{{< docs-imagebox img="/img/docs/v45/prometheus_query_editor_still.png"
                   animated-gif="/img/docs/v45/prometheus_query_editor.gif" >}}
 
 Name | Description